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EP0207465A2
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Aluminum nitride sintered body and preparation thereof
Assignee: Toshiba Corp
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Filing: 1986-06-27
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Granted: —
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Expires: 2006-06-27
Abstract
Abstract There are disclosed an aluminum sintered body comprising (a) aluminum nitride, (b) at least one compound selected from the group consisting of an aluminum compound of a rare earth metal, an aluminum compound of an alkaline earth metal, and an aluminum compound of a rare earth metal and an alkaline earth metal, and (c) at least one element selected from the transition elements consisting of Groups IVa, Va, Via, Vila and VIII of the periodic table, and/or at least one compound containing said element, and a process for preparing the same comprising mixing aluminum nitride with; (i) at least one of compound selected from the group consisting of a rare earth metal and/or an alkaline earth metal; and (ii) at least one of element selected from the group consisting of a transition element of Groups IVa, Va, Via, Vlla and VIII of the periodic table, and/or at least one of a compound containing said element; and then molding and sintering the mixture.
Inventors
- 👤 Mituo Kasori
- 👤 Kazuo Shinozaki
- 👤 Kazuo Anzai
- 👤 Akihiko Tsuge
- 👤 Hiroshi Imagawa
- 👤 Takeshi Takano
- 👤 Fumio Ueno
- 👤 Akihiro Horiguchi
- 👤 Hiroshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:30
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/581
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
83 words
An aluminum nitride sintered body which comprises; (a) aluminum nitride, (b) at least one compound selected from the group consisting of an aluminum compound of a rare earth metal, an aluminum compound of an alkaline earth metal, and an aluminum compound of a rare earth metal and an alkaline earth metal, and (c) at least one element selected from the transition elements consisting of Groups IVa, Va, VIa, VIIa and VIII of the periodic table, and/or at least one compound containing said element.
Claim 2
Dependent Claim
83 words
An aluminum nitride sintered body which comprises; (a) aluminum nitride, (b) at least one compound selected from the group consisting of an aluminum compound of a rare earth metal, an aluminum compound of an alkaline earth metal, and an aluminum compound of a rare earth metal and an alkaline earth metal, and (c) at least one element selected from the transition elements consisting of Groups IVa, Va, VIa, VIIa and VIII of the periodic table, and/or at least one compound containing said element.
Claim 3
Dependent Claim
22 words
The aluminum nitride sintered body according to Claim 1, wherein the content of aluminum nitride is 80 to 99.98 % by weight.
Claim 4
Dependent Claim
75 words
The aluminum nitride sintered body according to Claim 1, wherein the content of at least one of compound selected from the group consisting of an aluminum compound of a rare earth metal, an aluminum compound of an alkaline earth metal, and an aluminum compound of a rare earth metal and an alkaline earth metal is 0.01 to 18 % by weight in terms of respective oxides of said rare earth metal and/or alkaline earth metal.
Claim 5
Dependent Claim
58 words
The aluminum nitride sintered body according to Claim 1, wherein the content of a compound containing at least one kind of element selected from the group consisting of the transition elements of Groups IVa, Va, VIa, VIIa and VIII of the periodic table is 0.01 to 15 % by weight in terms of the oxide of said element.
Claim 6
Dependent Claim
30 words
The aluminum nitride sintered body according to Claim 1 wherein said rare earth metal(s) is(are) at least one kind of element selected from the group of Y, La and Ce.
Claim 7
Dependent Claim
29 words
The aluminum nitride sintered body according to Claim 1, wherein said alkaline earth metals are at least one of element selected from the group of Ca, Sr and Ba.
Claim 8
Dependent Claim
40 words
The aluminum nitride sintered body according to Claim 1, wherein said transition elements of Groups IVa, Va, VIa, VIIa and VIII are at least one selected from the group of Zr, Ti, Hf, Ni, Cr, Mn, Fe, Co and V.
Claim 9
Dependent Claim
56 words
The aluminum nitride sintered body according to Claim 1, wherein at least one of compound selected from the group of an aluminum compound of a rare earth metal, an aluminum compound of an alkaline earth metal, and an aluminum compound of a rare earth metal and an alkaline earth metal is an oxide and/or an oxyfluoride.
Claim 10
Dependent Claim
81 words
A process of preparing an aluminum nitride sintered body which comprises mixing aluminum nitride with; (i) at least one of compound selected from the group consisting of a rare earth metal and/or an alkaline earth metal; and (ii) at least one of element selected from the group consisting of a transition element of Groups IVa, Va, VIa, VIIa and VIII of the periodic table, and/or at least one of a compound containing said element; and then molding and sintering the mixture.
Claim 11
Dependent Claim
81 words
A process of preparing an aluminum nitride sintered body which comprises mixing aluminum nitride with; (i) at least one of compound selected from the group consisting of a rare earth metal and/or an alkaline earth metal; and (ii) at least one of element selected from the group consisting of a transition element of Groups IVa, Va, VIa, VIIa and VIII of the periodic table, and/or at least one of a compound containing said element; and then molding and sintering the mixture.
Claim 12
Dependent Claim
51 words
The process of preparing an aluminum nitride sintered body according to Claim 9, wherein the toltal content of a compound containing a rare earth metal and/or an alkaline earth metal is 0.01 to 18 % by weight in terms of respective oxides of said rare earth metal and/or alkaline earth metal.
Claim 13
Dependent Claim
49 words
The process of preparing an aluminum nitride sintered body according to Claim 9, wherein the total content of a transition element of Groups IVa, Va, VIa, VIIa and VIII, or a compound containing said element is 0.01 to 15 % by weight in terms of oxide of said element.
Claim 14
Dependent Claim
51 words
The process of preparing an aluminum nitried sintered body according to Claim 9, wherein said compounds containing a rare earth metal and/or an alkaline earth metal is an oxide, a nitride, a fluoride, or a substance which is converted into a compound of these kinds by sintering, or a combination thereof.
Claim 15
Dependent Claim
57 words
The process of preparing an aluminum nitride sinterd body according to Claim 9, wherein said compounds containing a transition element of Groups IVa, Va, VIa, VIIa and VIII of the periodic table is an oxide, a nitride, a fluoride, or a substance which is converted into a compound of these kinds by sintering, or a combination thereof.
Claim 16
Dependent Claim
26 words
The process of preparing an aluminm nitride sintered body according to Claim 9, wherein said aluminum nitride contains 0.001 to 7 % by weight of oxygen.
Claim 17
Dependent Claim
30 words
The process of preparing an aluminum nitride sintered body according to Claim 9, wherein the average particle diameter of a powder used for sintering is not larger than 5 µm.
Claim 18
Dependent Claim
33 words
The process of preparing an aluminum nitride sintered body according to Claim 9, wherein said alkaline earth metal is at least one of element selected from the group of Ca, Sr and Ba.
Claim 19
Dependent Claim
50 words
The process of preparing an aluminum nitride sintered body according to Claim 9, wherein said transition element of Groups IVa, Va, VIa, VIIa and VIII of the periodic table is at least one of element selected from the group of Zr, Ti, Hf, Ni, Cr, Mn, Fe, Co and V.
References Cited (Backward Citations)
No citation records indexed.
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