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EP0152545A1
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High thermal conductivity aluminum nitride ceramic body
Assignee: General Electric Co
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Filing: 1984-11-09
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Granted: —
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Expires: 2004-11-09
Abstract
Abstract A process for producing a polycrystalline aluminium nitride ceramic body having a composition defined and encompassed by line ABCDEFA but not including lines CD and EF of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm K at 22°C which comprises forming a mixture comprised of aluminium nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminium nitride and yttrium additive having a predetermined oxygen content, said mixture having a composition wherein the equivalent % of yttrium, aluminium, nitrogen and oxygen is defined and encompassed by line ABCDEFA but not including lines CD and EF in Figure 1, shaping said mixture into a compact and sintering said compact at a temperature ranging from about 1850 0 C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Inventors
- 👤 Irvin Charles Huseby
- 👤 Carl Francis Bobik
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:21
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/581
Claims Analysis
Total Claims: 128
Claim 1
Independent Claim
162 words
A process for producing a polycrystalline body having a composition defined and encompassed by line ABCDEF but not including lines CD and EF of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact said mixture and/or said compact having a composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line ABCDEF but not including lines CD and EF in Figure 1, and sintering said compact at a temperature ranging from about 1850°C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 2
Dependent Claim
162 words
A process for producing a polycrystalline body having a composition defined and encompassed by line ABCDEF but not including lines CD and EF of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact said mixture and/or said compact having a composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line ABCDEF but not including lines CD and EF in Figure 1, and sintering said compact at a temperature ranging from about 1850°C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 3
Dependent Claim
12 words
The process according to claim 1 wherein said yttrium additive is yttrium.
Claim 4
Dependent Claim
13 words
The process according to claim 1 wherein said yttrium additive is yttrium nitride.
Claim 5
Dependent Claim
41 words
The process according to claim 1 wherein said ceramic body and said mixture have a composition defined and encompassed by line ABK but not including line BK in Figure 1, and said sintering temperature ranges from about 1940°C to about 2050°C.
Claim 6
Dependent Claim
31 words
The process according to claim 1 wherein said polycrystalline body and said mixture have a composition defined by line BK, and said sintering temperature ranges from about 1940°C to about 2150°C.
Claim 7
Dependent Claim
40 words
The process according to claim 1 wherein said polycrystalline body and said mixture have a composition defined and encompassed by line BCJK but not including lines BK and CJ, and said sintering temperature ranges from about 1860°C to about 2080°C.
Claim 8
Dependent Claim
31 words
The process according to claim 1 wherein said polycrystalline body and said mixture have a composition defined by line DJ and said sintering temperature ranges from about 1850°C to about 2070°C.
Claim 9
Dependent Claim
40 words
The process according to claim 1 wherein said polycrystalline body and said mixture have a composition defined and encompassed by line DEFJ but not including lines DJ and EF, and said sintering temperature ranges from about 1850°C to about 2050°C.
Claim 10
Dependent Claim
160 words
A process for producing a polycrystalline aluminum nitride ceramic body having a composition defined and encompassed by line GHIJ but not including line IJ of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.5 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact, said mixtureand/or said compact having a composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line GHIJ but not including line IJ in Figure 1, and sintering said compact at a temperature ranging from about 1860°C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 11
Dependent Claim
160 words
A process for producing a polycrystalline aluminum nitride ceramic body having a composition defined and encompassed by line GHIJ but not including line IJ of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.5 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact, said mixtureand/or said compact having a composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line GHIJ but not including line IJ in Figure 1, and sintering said compact at a temperature ranging from about 1860°C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 12
Dependent Claim
201 words
A process for producing a polycrystalline ceramic body having a composition comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact, said mixture and/or said compact having a composition comprised of an equivalent % of yttrium, aluminum, oxygen and nitrogen which does not differ significantly from that of said polycrystalline body, and sintering said compact at a temperature ranging from about 1850 0 C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 13
Dependent Claim
201 words
A process for producing a polycrystalline ceramic body having a composition comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact, said mixture and/or said compact having a composition comprised of an equivalent % of yttrium, aluminum, oxygen and nitrogen which does not differ significantly from that of said polycrystalline body, and sintering said compact at a temperature ranging from about 1850 0 C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 14
Dependent Claim
86 words
A process for producing a polycrystalline ceramic body having a composition comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, a porosity of less than about 5% by volume of said body and a thermal conductivity greater than
Claim 15
Dependent Claim
86 words
A process for producing a polycrystalline ceramic body having a composition comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, a porosity of less than about 5% by volume of said body and a thermal conductivity greater than
Claim 16
Dependent Claim
113 words
5 W/cmeK at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact, said mixture and/or said compact having a composition comprised of an equivalent % of yttrium, aluminum, oxygen and nitrogen which does not differ significantly from that of said polycrystalline body, and sintering said compact at a temperature ranging from about 1860°C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 17
Dependent Claim
113 words
5 W/cmeK at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, shaping said mixture into a compact, said mixture and/or said compact having a composition comprised of an equivalent % of yttrium, aluminum, oxygen and nitrogen which does not differ significantly from that of said polycrystalline body, and sintering said compact at a temperature ranging from about 1860°C to about 2170°C in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.
Claim 18
Dependent Claim
46 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line ABCDEF but not including lines CD and EF of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 19
Dependent Claim
46 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line ABCDEF but not including lines CD and EF of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 20
Dependent Claim
56 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line ABK but not including line BK of Figure 1, a phase composition comprised of A1N, Y 2 0 3 and YN, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 21
Dependent Claim
56 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line ABK but not including line BK of Figure 1, a phase composition comprised of A1N, Y 2 0 3 and YN, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 22
Dependent Claim
49 words
A polycrystalline aluminum nitride body having a composition defined by line BK of Figure 1, a phase composition comprised of AlN and Y 2 0 3 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 23
Dependent Claim
49 words
A polycrystalline aluminum nitride body having a composition defined by line BK of Figure 1, a phase composition comprised of AlN and Y 2 0 3 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 24
Dependent Claim
64 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line BCJK but not including lines BK and CJ of Figure 1, a phase composition comprised of AlN, Y 2 0 3 and Y 4 Al 2 O 9 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 25
Dependent Claim
64 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line BCJK but not including lines BK and CJ of Figure 1, a phase composition comprised of AlN, Y 2 0 3 and Y 4 Al 2 O 9 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 26
Dependent Claim
51 words
A polycrystalline aluminum nitride body having a composition defined by line DJ of Figure 1, a phase composition comprised of AlN and Y 4 Al 2 O 9 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 27
Dependent Claim
51 words
A polycrystalline aluminum nitride body having a composition defined by line DJ of Figure 1, a phase composition comprised of AlN and Y 4 Al 2 O 9 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 28
Dependent Claim
60 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line DEFJ but not including lines DJ and EF of Figure 1, a phase composition comprised of A1N, Y 4 Al 2 O 9 and YA103, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 29
Dependent Claim
60 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line DEFJ but not including lines DJ and EF of Figure 1, a phase composition comprised of A1N, Y 4 Al 2 O 9 and YA103, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 30
Dependent Claim
44 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line GHIJ but not including line IJ of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.5 W/cm·K at 22°C.
Claim 31
Dependent Claim
44 words
A polycrystalline aluminum nitride body having a composition defined and encompassed by line GHIJ but not including line IJ of Figure 1, a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.5 W/cm·K at 22°C.
Claim 32
Dependent Claim
89 words
A polycrystalline body having a composition comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 33
Dependent Claim
89 words
A polycrystalline body having a composition comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 34
Dependent Claim
90 words
A polycrystalline body having a composition comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 5% by volume of said body and a thermal conductivity greater than about 1.5 W/cm*K @ 22°C.
Claim 35
Dependent Claim
90 words
A polycrystalline body having a composition comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 5% by volume of said body and a thermal conductivity greater than about 1.5 W/cm*K @ 22°C.
Claim 36
Dependent Claim
90 words
A polycrystalline body having a composition comprised of from greater than about 4.4 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 95.6 equivalent % aluminum, from greater than about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 95.6 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than about 1.0 W/cm*K @ 22°C.
Claim 37
Dependent Claim
90 words
A polycrystalline body having a composition comprised of from greater than about 4.4 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 95.6 equivalent % aluminum, from greater than about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 95.6 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than about 1.0 W/cm*K @ 22°C.
Claim 38
Dependent Claim
83 words
A polycrystalline body having a composition comprised of from about 4.4 equivalent % yttrium to about 15.25 equivalent % yttrium, from about 84.75 equivalent % aluminum to about 95.6 equivalent % aluminum, from about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen to about 95.6 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volme of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 39
Dependent Claim
83 words
A polycrystalline body having a composition comprised of from about 4.4 equivalent % yttrium to about 15.25 equivalent % yttrium, from about 84.75 equivalent % aluminum to about 95.6 equivalent % aluminum, from about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen to about 95.6 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volme of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 40
Dependent Claim
96 words
A polycrystalline body having a composition comprised of from greater than about 2.5 equivalent % yttrium up to about 15.25 equivalent % yttrium, from greater than about 84.75 equivalent % aluminum up to about 97. 5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen up to about 15.25 equivalent % oxygen and from greater than about 84.75 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 41
Dependent Claim
96 words
A polycrystalline body having a composition comprised of from greater than about 2.5 equivalent % yttrium up to about 15.25 equivalent % yttrium, from greater than about 84.75 equivalent % aluminum up to about 97. 5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen up to about 15.25 equivalent % oxygen and from greater than about 84.75 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 42
Dependent Claim
83 words
A polycrystalline body having a composition comprised of from about 2.5 equivalent % yttrium to about 5.5 equivalent % yttrium, from about 94.5 equivalent % aluminum to about 97.5 equivalent % aluminum, from about 4.1 equivalent % oxygen to about 8.5 equivalent % oxygen and from about 91.5 equivalent % nitrogen to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 43
Dependent Claim
83 words
A polycrystalline body having a composition comprised of from about 2.5 equivalent % yttrium to about 5.5 equivalent % yttrium, from about 94.5 equivalent % aluminum to about 97.5 equivalent % aluminum, from about 4.1 equivalent % oxygen to about 8.5 equivalent % oxygen and from about 91.5 equivalent % nitrogen to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 44
Dependent Claim
96 words
A polycrystalline body having a composition comprised of from greater than about 1.6 equivalent % yttrium up to about 5.5 equivalent % yttrium, from greater than about 94.5 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen up to about 11.25 equivalent % oxygen and from greater than about 88.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than about 1.0 W/cm·K @ 22°C.
Claim 45
Dependent Claim
96 words
A polycrystalline body having a composition comprised of from greater than about 1.6 equivalent % yttrium up to about 5.5 equivalent % yttrium, from greater than about 94.5 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen up to about 11.25 equivalent % oxygen and from greater than about 88.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than about 1.0 W/cm·K @ 22°C.
Claim 46
Dependent Claim
71 words
A polycrystalline body having a phase composition comprised of AlN and a second phase containing Y and 0 wherein the total amount of said second phase ranges from greater than about 4.2% by volume to about 27.3% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 47
Dependent Claim
71 words
A polycrystalline body having a phase composition comprised of AlN and a second phase containing Y and 0 wherein the total amount of said second phase ranges from greater than about 4.2% by volume to about 27.3% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 48
Dependent Claim
96 words
A polycrystalline body having a phase composition comprised of A1N, Y 2 0 3 and YN wherein the total amount of said Y 2 0 3 and YN phases ranges from greater than about 7.6% by volume to about 27.3% by volume of the total volume of said body, said Y 2 0 3 phase being present in an amount of at least about 7.6% by volume of said sintered body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 49
Dependent Claim
96 words
A polycrystalline body having a phase composition comprised of A1N, Y 2 0 3 and YN wherein the total amount of said Y 2 0 3 and YN phases ranges from greater than about 7.6% by volume to about 27.3% by volume of the total volume of said body, said Y 2 0 3 phase being present in an amount of at least about 7.6% by volume of said sintered body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 50
Dependent Claim
69 words
A polycrystalline body having a phase composition comprised of A1N and Y 2 0 3 wherein the total amount of said Y 2 0 3 phase ranges from about 7.6% by volume to about 24.3% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 51
Dependent Claim
69 words
A polycrystalline body having a phase composition comprised of A1N and Y 2 0 3 wherein the total amount of said Y 2 0 3 phase ranges from about 7.6% by volume to about 24.3% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 52
Dependent Claim
85 words
A polycrystalline body having a phase composition comprised of AlN, Y 2 0 3 and Y 4 Al 2 0 9 wherein the total amount of said Y 2 0 3 and Y 4 Al 2 O 9 phases ranges from greater than about 6.0% by volume up to about 24.3% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 53
Dependent Claim
85 words
A polycrystalline body having a phase composition comprised of AlN, Y 2 0 3 and Y 4 Al 2 0 9 wherein the total amount of said Y 2 0 3 and Y 4 Al 2 O 9 phases ranges from greater than about 6.0% by volume up to about 24.3% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 54
Dependent Claim
73 words
A polycrystalline body having a phase composition comprised of AlN and Y 4 Al 2 O 9 wherein the total amount of said Y 4 Al 2 O 9 phase ranges from about 6.0% by volume to about 12.7% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 55
Dependent Claim
73 words
A polycrystalline body having a phase composition comprised of AlN and Y 4 Al 2 O 9 wherein the total amount of said Y 4 Al 2 O 9 phase ranges from about 6.0% by volume to about 12.7% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 56
Dependent Claim
81 words
A polycrystalline body having a phase composition comprised of A1N, Y 4 Al 2 O 9 and YAlO 3 wherein the total amount of said Y 4 Al 2 O 9 and YA10 3 phases ranges from greater than about 4.2% by volume up to about 13.6% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 57
Dependent Claim
81 words
A polycrystalline body having a phase composition comprised of A1N, Y 4 Al 2 O 9 and YAlO 3 wherein the total amount of said Y 4 Al 2 O 9 and YA10 3 phases ranges from greater than about 4.2% by volume up to about 13.6% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 58
Dependent Claim
34 words
In the following new claims the portions in square parenthesis were contained in the corresponding original cliams but are considered to be deleted. The underlined portions are added, compared with the corresponding original claim.
Claim 59
Dependent Claim
280 words
(Amended) A process for producing a polycrystalline body [having] comprised of a composition defined and encompassed by line ABCDEFA but not including lines CD and EF of Figure 1, a porosity of less than about [10] 5% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive [having a predetermined oxygen content,] containing oxygen, shaping said mixture into a compact, said mixture and[/or] said compact [having] being comprised of E composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line ABCDEFA but not including lines CD and EF in Figure 1, said mixture, said compact and said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, and sintering said compact at a temperature ranging from about 1850°C to about 2170°C in an atmosphere at ambient pressure selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body, said compact containing sufficient equivalent percent of yttrium and oxygen to form a sufficient amount of liquid phase at sintering temperature to densify the compact to produce said polycrystalline body, said sintering temperature being a sintering temperature for said compact.
Claim 60
Dependent Claim
280 words
(Amended) A process for producing a polycrystalline body [having] comprised of a composition defined and encompassed by line ABCDEFA but not including lines CD and EF of Figure 1, a porosity of less than about [10] 5% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive [having a predetermined oxygen content,] containing oxygen, shaping said mixture into a compact, said mixture and[/or] said compact [having] being comprised of E composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line ABCDEFA but not including lines CD and EF in Figure 1, said mixture, said compact and said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, and sintering said compact at a temperature ranging from about 1850°C to about 2170°C in an atmosphere at ambient pressure selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body, said compact containing sufficient equivalent percent of yttrium and oxygen to form a sufficient amount of liquid phase at sintering temperature to densify the compact to produce said polycrystalline body, said sintering temperature being a sintering temperature for said compact.
Claim 61
Dependent Claim
114 words
(Amended) The process according to claim 1 wherein said [ceramic body and said mixture have] compact and said polycrystalline body are comprised of a composition defined and encompassed by line ABKA but not including line BK in Figure 1, said compact and said polycrystalline body are comprised of from greater than about 4.4 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 95.6 equivalent % aluminum, from greater than about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 95.6 equivalent % nitrogen, and said sintering temperature ranges from about 1940°C to about 2050°C.
Claim 62
Dependent Claim
98 words
(Amended) The process according to claim 1 wherein said compact and said polycrystalline body [and said mixture have] are comprised of a composition defined by line BK of Figure 1, said compact and said polycrystalline body are comprised of from about 4.4 equivalent % yttrium to about 15.25 equivalent % yttrium, from about 84.75 equivalent % aluminum to about 95.6 equivalent % aluminum, from about 4.4 equivalent oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen to about 95.6 equivalent % nitrogen, and said sintering temperature ranges from about 1940°C to about 2150°C.
Claim 63
Dependent Claim
120 words
(Amended) The process according to claim 1 wherein said compact and said polycrystalline body [and said mixture have] are comprised of a composition defined and encompassed by line BCJKB but not including lines BK and CJ of Figure 1, said compact and said polycrystalline body are comprised of from greater than about 2.5 equivalent % yttrium up to about 15.25 equivalent % yttrium, from greater than about 84.75 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen up to about 15.25 equivalent % oxygen and from greater than about 84.75 equivalent % nitrogen up to about 95.9 eguivalent % nitrogen, and said sintering temperature ranges from about 1860°C to about 2080°C.
Claim 64
Dependent Claim
98 words
(Amended) The process according to claim 1 wherein said compact and said polycrystalline body [and said mixture have] are comprised of a composition defined by line DJ of Figure 1, said compact and said polycrystalline body are comprised of from about 2.5 equivalent % yttrium to about 5.5 equivalent % yttrium, from about 94.5 equivalent % aluminum to about 97.5 equivalent % aluminum, from about 4.1 equivalent % oxygen to about 8.5 equivalent % oxygen and from about 91.5 equivalent % nitrogen to about-95.9 equivalent % nitrogen, and said sintering temperature ranges from about 1850°C to about 2070°C.
Claim 65
Dependent Claim
120 words
(Amended) The process according to claim 1 wherein said compact and said polycrystalline body [and said mixture have] are comprised of a composition defined and encompassed by line DEFJD but not including lines DJ and EF of Figure 1, said compact and said polycrystalline body are comprised of from greater than about 1.6 equivalent % yttrium up to about 5.5 equivalent % yttrium, from greater than about 94.5 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen up to about 11.25 equivalent % oxygen and from greater than about 88.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, and said sintering temperature ranges from about 1850°C to about 2050°C.
Claim 66
Dependent Claim
269 words
(Amended) A process for producing a polycrystalline aluminum nitride ceramic body [having] comprised of a composition defined and encompassed by line GHIJG but not including line IJ of Figure 1, a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than [1.5] 1.0 W/cmeK at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive [having a predetermined oxygen content] containing oxygen, shaping said mixture into a compact, said mixture and[/or] said compact having a composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line GHIJC but not including line IJ in Figure 1, said mixture, said compact and said polycrystalline body having a composition comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 eguivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 eguivalent % nitrogen up to about 95.9 equivalent % nitrogen, and sintering said compact at a temperature ranging from about 1860°C to about 2170°C in an atmosphere at ambient pressure selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body, said compact containing sufficient equivalent percent of yttrium and oxygen to form a sufficient amount of liquid phase at said sintering temperature to densify said compact to produce said polycrystalline body.
Claim 67
Dependent Claim
269 words
(Amended) A process for producing a polycrystalline aluminum nitride ceramic body [having] comprised of a composition defined and encompassed by line GHIJG but not including line IJ of Figure 1, a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than [1.5] 1.0 W/cmeK at 22°C which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive [having a predetermined oxygen content] containing oxygen, shaping said mixture into a compact, said mixture and[/or] said compact having a composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen is defined and encompassed by line GHIJC but not including line IJ in Figure 1, said mixture, said compact and said polycrystalline body having a composition comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 eguivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 eguivalent % nitrogen up to about 95.9 equivalent % nitrogen, and sintering said compact at a temperature ranging from about 1860°C to about 2170°C in an atmosphere at ambient pressure selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body, said compact containing sufficient equivalent percent of yttrium and oxygen to form a sufficient amount of liquid phase at said sintering temperature to densify said compact to produce said polycrystalline body.
Claim 68
Dependent Claim
114 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line ABCDEFA but not including lines CD and EF of Figure 1, said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 69
Dependent Claim
114 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line ABCDEFA but not including lines CD and EF of Figure 1, said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 70
Dependent Claim
124 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line ABKA but. not including line BK of Figure 1, said polycrystalline body being comprised of from greater than about 4.4 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 95.6 equivalent % aluminum, from greater than about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 95.6 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N, Y 2 0 3 and YN, a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 71
Dependent Claim
124 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line ABKA but. not including line BK of Figure 1, said polycrystalline body being comprised of from greater than about 4.4 equivalent % yttrium to about 19.75 equivalent % yttrium, from about 80.25 equivalent % aluminum up to about 95.6 equivalent % aluminum, from greater than about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 95.6 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N, Y 2 0 3 and YN, a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 72
Dependent Claim
111 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined by line BK of Figure 1, said polycrystalline body being comprised of from about 4.4 equivalent % yttrium to about 15.25 equivalent % yttrium, from about 84.75 equivalent % aluminum to about 95.6 equivalent % aluminum, from about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen to about 95.6 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N and Y 2 O 3 , a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 73
Dependent Claim
111 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined by line BK of Figure 1, said polycrystalline body being comprised of from about 4.4 equivalent % yttrium to about 15.25 equivalent % yttrium, from about 84.75 equivalent % aluminum to about 95.6 equivalent % aluminum, from about 4.4 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen to about 95.6 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N and Y 2 O 3 , a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 74
Dependent Claim
138 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line BCJKB but not including lines BK and CJ of Figure 1, said polycrystalline body being comprised of from greater than about 2.5 equivalent % yttrium up to about 15.25 equivalent % yttrium, from greater than about 84.75 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen up to about 15.25 equivalent % oxygen and from greater than about 84.75 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of AlN, Y 2 O 3 and Y 4 Al 2 O 9 , a porosity. of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 75
Dependent Claim
138 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line BCJKB but not including lines BK and CJ of Figure 1, said polycrystalline body being comprised of from greater than about 2.5 equivalent % yttrium up to about 15.25 equivalent % yttrium, from greater than about 84.75 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen up to about 15.25 equivalent % oxygen and from greater than about 84.75 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of AlN, Y 2 O 3 and Y 4 Al 2 O 9 , a porosity. of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 76
Dependent Claim
113 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined by line DJ of Figure 1, said polycrystalline body being comprised of from about 2.5 equivalent % yttrium to about 5.5 equivalent % yttrium, from about 94.5 equivalent % aluminum to about 97.5 equivalent % aluminum, from about 4.1 equivalent % oxygen to about 8.5 equivalent % oxygen and from about 91.5 equivalent % nitrogen to about 95.9 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of AlN and Y 4 Al 2 O 9 , a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 77
Dependent Claim
113 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined by line DJ of Figure 1, said polycrystalline body being comprised of from about 2.5 equivalent % yttrium to about 5.5 equivalent % yttrium, from about 94.5 equivalent % aluminum to about 97.5 equivalent % aluminum, from about 4.1 equivalent % oxygen to about 8.5 equivalent % oxygen and from about 91.5 equivalent % nitrogen to about 95.9 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of AlN and Y 4 Al 2 O 9 , a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 78
Dependent Claim
136 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line DEFJD but not including lines DJ and EF of Figure 1, said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium up to about 5.5 equivalent % yttrium, from greater than about 94.5 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen up to about 11.25 equivalent % oxygen and from greater than about 88.75 eguivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of AlN, Y 4 Al 2 O 9 and YAlO 3 , a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 79
Dependent Claim
136 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line DEFJD but not including lines DJ and EF of Figure 1, said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium up to about 5.5 equivalent % yttrium, from greater than about 94.5 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen up to about 11.25 equivalent % oxygen and from greater than about 88.75 eguivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of AlN, Y 4 Al 2 O 9 and YAlO 3 , a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 80
Dependent Claim
113 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line GHIJG but not including line IJ of Figure 1, said polycrystalline body being comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 eguivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than [1.5] 1.0 W/cm·K at 22°C.
Claim 81
Dependent Claim
113 words
(Amended) A polycrystalline aluminum nitride body [having] comprised of a composition defined and encompassed by line GHIJG but not including line IJ of Figure 1, said polycrystalline body being comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 eguivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than [1.5] 1.0 W/cm·K at 22°C.
Claim 82
Dependent Claim
192 words
(Amended) A polycrystalline body having a phase composition comprised of AlN and a second phase [containing Y and O] wherein the total amount of said second phase ranges from greater than about 4.2% by volume to about 27.3% by volume of the total volume of said body, said second phase being selected from the group consisting of Y 2 O 3 , Y 4 Al 2 O 9 , a mixture of Y 2 O 3 and YN, a mixture of Y 2 0 3 and Y 4 Al 2 O 9 and a mixture of Y 4 Al 2 O 9 and YAlO 3 , said polycystalline body being comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 eauivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 83
Dependent Claim
192 words
(Amended) A polycrystalline body having a phase composition comprised of AlN and a second phase [containing Y and O] wherein the total amount of said second phase ranges from greater than about 4.2% by volume to about 27.3% by volume of the total volume of said body, said second phase being selected from the group consisting of Y 2 O 3 , Y 4 Al 2 O 9 , a mixture of Y 2 O 3 and YN, a mixture of Y 2 0 3 and Y 4 Al 2 O 9 and a mixture of Y 4 Al 2 O 9 and YAlO 3 , said polycystalline body being comprised of from greater than about 1.6 equivalent % yttrium to about 19.75 eauivalent % yttrium, from about 80.25 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen to about 15.25 equivalent % oxygen and from about 84.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 84
Dependent Claim
103 words
(Amended) A polycrystalline body having a phase composition comprised of A1N, and a mixture of Y 2 0 3 and YN wherein the total amount of said mixture of Y 2 O 3 and YN phases ranges from greater than about 7.6% by volume to about 27.3% by volume of the total volume of said body, said Y 2 0 3 phase being present in an amount of at least about 7.6% by volume of said sintered body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 85
Dependent Claim
103 words
(Amended) A polycrystalline body having a phase composition comprised of A1N, and a mixture of Y 2 0 3 and YN wherein the total amount of said mixture of Y 2 O 3 and YN phases ranges from greater than about 7.6% by volume to about 27.3% by volume of the total volume of said body, said Y 2 0 3 phase being present in an amount of at least about 7.6% by volume of said sintered body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 86
Dependent Claim
70 words
(Amended) A polycrystalline body having a phase composition comprised of A1N and Y 2 O 3 wherein the total amount of said Y 2 0 3 phase ranges from about 7.6% by volume to about 24.3% by volume of the total volume of said body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 87
Dependent Claim
70 words
(Amended) A polycrystalline body having a phase composition comprised of A1N and Y 2 O 3 wherein the total amount of said Y 2 0 3 phase ranges from about 7.6% by volume to about 24.3% by volume of the total volume of said body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 88
Dependent Claim
135 words
(Amended) A polycrystalline body having a phase composition comprised of A1N[,] and a mixture of Y 2 0 3 and Y 4 Al 2 O 9 wherein the total amount of said mixture of Y 2 0 3 and Y 4 Al 2 O 9 phases ranges from greater than about 6.0% by volume up to about 24.3% by volume of the total volume of said body, said Y 2 O 3 phase ranging from a trace amount up to about 24.3% by volume of said body, and said Y 4 Al 2 O 9 phase ranging from a trace amount to about 17.1% by volume of said sintered body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 89
Dependent Claim
135 words
(Amended) A polycrystalline body having a phase composition comprised of A1N[,] and a mixture of Y 2 0 3 and Y 4 Al 2 O 9 wherein the total amount of said mixture of Y 2 0 3 and Y 4 Al 2 O 9 phases ranges from greater than about 6.0% by volume up to about 24.3% by volume of the total volume of said body, said Y 2 O 3 phase ranging from a trace amount up to about 24.3% by volume of said body, and said Y 4 Al 2 O 9 phase ranging from a trace amount to about 17.1% by volume of said sintered body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 90
Dependent Claim
74 words
(Amended) A polycrystalline body having a phase composition comprised of A1N and Y 4 A1 2 0 9 wherein the total amount of said Y 4 A1 2 0 9 phase ranges from about 6.0% by volume to about 12.7% by volume of the total volume of said body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 91
Dependent Claim
74 words
(Amended) A polycrystalline body having a phase composition comprised of A1N and Y 4 A1 2 0 9 wherein the total amount of said Y 4 A1 2 0 9 phase ranges from about 6.0% by volume to about 12.7% by volume of the total volume of said body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 92
Dependent Claim
144 words
(Amended) A polycrystalline body having a phase composition comprised of AlN[,] and a mixture of Y 4 Al 2 O 9 and YAlO 3 wherein the total amount of said mixture of Y 4 A1 2 0 9 and YA10 3 phases ranges from greater than about 4.2% by volume up to about 13.6% by volume of the total volume of said body, said YgAl 2 O 9 phase ranging from a trace amount to about 12.7% by volume of the total volume of said body, and said YAlO 3 phase ranging from a trace amount up to about 13.6% by volume of the total volume of said body, said body having a porosity of less than about [10]5% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C. CANCEL claims 10, 11 and 19-25. INSERT the following claims:
Claim 93
Dependent Claim
27 words
-- 32. The polycrystalline aluminum nitride body according to claim 12 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 94
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 13 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 95
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 14 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 96
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 15 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 97
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 16 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 98
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 17 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 99
Dependent Claim
35 words
The polycrystalline aluminum nitride body according to claim 18 wherein said body has a porosity of less than about 2% by volume of said body and a thermal conductivity greater than 1.5 W/cm-K at 22°C.
Claim 100
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 26 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 101
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 27 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 102
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 28 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 103
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 29 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 104
Dependent Claim
24 words
The polycrystalline aluminum nitride body according to claim 30 wherein said body has a porosity of less than about 2% by volume of.said body.
Claim 105
Dependent Claim
25 words
The polycrystalline aluminum nitride body according to claim 31 wherein said body has a porosity of less than about 2% by volume of said body.
Claim 106
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 12 wherein said body is a liquid phase sintered body.
Claim 107
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 13 wherein said body is a liquid phase sintered body.
Claim 108
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 14 wherein said body is a liquid phase sintered body.
Claim 109
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 15 wherein said body is a liquid phase sintered body.
Claim 110
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 16 wherein said body is a liquid phase sintered body.
Claim 111
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 17 wherein said body is a liquid phase sintered body.
Claim 112
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 18 wherein said body is a liquid phase sintered body.
Claim 113
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 26 wherein said body is a liquid phase sintered body.
Claim 114
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 27 wherein said body is a liquid phase sintered body.
Claim 115
Dependent Claim
18 words
The polycrystalline aluminum nitride body. according to claim 28 wherein said body is a liquid phase sintered body.
Claim 116
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 29 wherein said body is a liquid phase sintered body.
Claim 117
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 30 wherein said body is a liquid phase sintered body.
Claim 118
Dependent Claim
18 words
The polycrystalline aluminum nitride body according to claim 31 wherein said body is a liquid phase sintered body.
Claim 119
Dependent Claim
111 words
A polycrystalline aluminum nitride body comprised of a composition defined by line DJ of Figure 1, said polycrystalline body being comprised of from about 2.5 equivalent % yttrium to about 5.5 equivalent % yttrium, from about 94.5 equivalent % aluminum to about 97.5 equivalent % aluminum, from about 4.1 equivalent % oxygen to about 8.5 equivalent % oxygen and from about 91.5 equivalent % nitrogen to about 95.9 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N and Y 4 Al 2 O 9 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm-K at 22°C.
Claim 120
Dependent Claim
111 words
A polycrystalline aluminum nitride body comprised of a composition defined by line DJ of Figure 1, said polycrystalline body being comprised of from about 2.5 equivalent % yttrium to about 5.5 equivalent % yttrium, from about 94.5 equivalent % aluminum to about 97.5 equivalent % aluminum, from about 4.1 equivalent % oxygen to about 8.5 equivalent % oxygen and from about 91.5 equivalent % nitrogen to about 95.9 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N and Y 4 Al 2 O 9 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm-K at 22°C.
Claim 121
Dependent Claim
134 words
A polycrystalline aluminum nitride body comprised of a composition defined and encompassed by line DEFJD but not including lines DJ and EF of Figure 1, said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium up to about 5.5 equivalent % yttrium, from greater than about 94.5 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen up to about 11.25 equivalent % oxygen and from greater than about 88.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N, Y 4 Al 2 O 9 and YAlO 3 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 122
Dependent Claim
134 words
A polycrystalline aluminum nitride body comprised of a composition defined and encompassed by line DEFJD but not including lines DJ and EF of Figure 1, said polycrystalline body being comprised of from greater than about 1.6 equivalent % yttrium up to about 5.5 equivalent % yttrium, from greater than about 94.5 equivalent % aluminum up to about 98.4 equivalent % aluminum, from greater than about 4.0 equivalent % oxygen up to about 11.25 equivalent % oxygen and from greater than about 88.75 equivalent % nitrogen up to about 96 equivalent % nitrogen, said polycrystalline body having a phase composition comprised of A1N, Y 4 Al 2 O 9 and YAlO 3 , a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm*K at 22°C.
Claim 123
Dependent Claim
110 words
A polycrystalline aluminum nitride body comprised of a composition defined and encompassed by line GHIJG but not including line IJ of Figure 1, said polycrystalline body being comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 124
Dependent Claim
110 words
A polycrystalline aluminum nitride body comprised of a composition defined and encompassed by line GHIJG but not including line IJ of Figure 1, said polycrystalline body being comprised of from greater than about 2.5 equivalent % yttrium to about 9.5 equivalent % yttrium, from about 90.5 equivalent % aluminum up to about 97.5 equivalent % aluminum, from greater than about 4.1 equivalent % oxygen to about 8.0 equivalent % oxygen and from about 92.0 equivalent % nitrogen up to about 95.9 equivalent % nitrogen, said polycrystalline body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 125
Dependent Claim
72 words
A polycrystalline body having a phase composition comprised of AlN and Y 4 Al 2 O 9 wherein the total amount of said Y4A l 2 0 9 phase ranges from about 6.0% by volume to about 12.7% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 126
Dependent Claim
72 words
A polycrystalline body having a phase composition comprised of AlN and Y 4 Al 2 O 9 wherein the total amount of said Y4A l 2 0 9 phase ranges from about 6.0% by volume to about 12.7% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C.
Claim 127
Dependent Claim
137 words
A polycrystalline body having a phase composition comprised of A1N and a mixture of Y 4 Al 2 O 9 and YAlO 3 wherein the total amount of said mixture of Y 4 Al 2 O 9 and YAlO 3 phases ranges from greater than about 4.2% by volume up to about 13.6% by : volume of the total volume of said body, said Y 4 Al 2 O 9 phase ranging from a trace amount to about 12.7% by volume of the total volume of said body, and said YAlO 3 phase ranging from a trace amount up to about 13.6% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C. --
Claim 128
Dependent Claim
137 words
A polycrystalline body having a phase composition comprised of A1N and a mixture of Y 4 Al 2 O 9 and YAlO 3 wherein the total amount of said mixture of Y 4 Al 2 O 9 and YAlO 3 phases ranges from greater than about 4.2% by volume up to about 13.6% by : volume of the total volume of said body, said Y 4 Al 2 O 9 phase ranging from a trace amount to about 12.7% by volume of the total volume of said body, and said YAlO 3 phase ranging from a trace amount up to about 13.6% by volume of the total volume of said body, said body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm·K at 22°C. --
References Cited (Backward Citations)
EP0114193A1
Cited
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