US3950176A
Expired / Lapsed
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Semiconducting glasses and the method of preparation thereof
Assignee: American Optical Corp
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Filing: 1974-04-24
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Granted: 1976-04-13
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Expires: 1994-04-24
Abstract
Abstract Chemically stable, semiconducting glasses having a resistivity of from about 2 × 10 7 to about 6 × 10 8 ohm.sup.. cm contain 25 to 35 weight percent of vanadium pentoxide, 10 to 20 weight percent phosphorous pentoxide, and from 35 to 45 weight percent of molybdenum trioxide. These semiconducting glasses are melted readily, are castable into desired shapes, and offer good resistance to devitrification.
Inventors
- 👤 Emil W. Deeg
- 👤 Robert E. Graf
- 👤 Robert J. Landry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:26
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/09; C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/21; C03C4/00; C03C4/14; H01J37/06; H01J37/073
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
83 words
A semiconducting glass composition consisting essentially of as given in weight percent: V.sub.2 O.sub.5 25-35
MoO.sub.3 35-45
P.sub.2 O.sub.5 10-20
BaO 0-15
Al.sub.2 O.sub.3 0-5
Fe.sub.3 O.sub.4 0-10
CaO 0-2
Co.sub.3 O.sub.4 0-4 with V 2 O 5 + MoO 3 + P 2 O 5 being in the range of 70 to 90 weight percent, the glass being chemically stable and having a resistivity within the range of from about 2 × 10 7 to about 6 × 10 8 ohm.sup.. cm.
Claim 2
Dependent Claim
83 words
A semiconducting glass composition consisting essentially of as given in weight percent: V.sub.2 O.sub.5 25-35
MoO.sub.3 35-45
P.sub.2 O.sub.5 10-20
BaO 0-15
Al.sub.2 O.sub.3 0-5
Fe.sub.3 O.sub.4 0-10
CaO 0-2
Co.sub.3 O.sub.4 0-4 with V 2 O 5 + MoO 3 + P 2 O 5 being in the range of 70 to 90 weight percent, the glass being chemically stable and having a resistivity within the range of from about 2 × 10 7 to about 6 × 10 8 ohm.sup.. cm.
Claim 3
Dependent Claim
34 words
A semiconducting glass composition according to claim 1 wherein the ingredients are present in the following weight percentages: V.sub.2 O.sub.5 28.00
MoO.sub.3 37.00
BaO 12.98
Al.sub.2 O.sub.3 0.58
P.sub.2 O.sub.5 14.44
Fe.sub.3 O.sub.4 7.00.
Claim 4
Dependent Claim
36 words
A semiconducting glass composition according to claim 1 wherein the ingredients are present in the following weight percentages: V.sub.2 O.sub.5 29.00
MoO 37.00
BaO 8.00
P.sub.2 O.sub.5 16.00
Fe.sub.3 O.sub.4 6.00
CaO 1.00
Co.sub.3 O.sub.4 3.00.
Claim 5
Dependent Claim
32 words
A semiconducting glass composition according to claim 1 wherein the ingredients are present in the following weight percentages: V.sub.2 O.sub.5 32.00
MoO.sub.3 41.00
Al.sub.2 O.sub.3 3.86
P.sub.2 O.sub.5 16.14
Fe.sub.3 O.sub.4 7.00.
Claim 6
Dependent Claim
33 words
A semiconducting glass composition according to claim 1 wherein the ingredients are present in the following weight percentages: V.sub.2 O.sub.5 29.00
MoO.sub.3 37.00
BaO 12.00
P.sub.2 O.sub.5 15.00
Fe.sub.3 O.sub.4 6.00
CaO 1.00.
Claim 7
Dependent Claim
33 words
A semiconducting glass composition according to claim 1 wherein the ingredients are present in the following weight percentages: V.sub.2 O.sub.5 30.85
MoO.sub.3 39.36
BaO 8.51
P.sub.2 O.sub.5 17.02
Cao 1.07
Co.sub.3 O.sub.4 3.19.
Claim 8
Dependent Claim
25 words
A semiconducting glass composition according to claim 1 wherein the V 2 O 5 + MoO 3 + P 2 O 5 is about 79-89%.
Claim 9
Independent Claim
138 words
A method of manufacturing a semiconducting glass composition comprising: thoroughly mixing the following ingredients where the ingredients are present in the following ranges as given in weight percent: V.sub.2 O.sub.5 25-35
MoO.sub.3 35-45
P.sub.2 O.sub.5 10-20
BaO 0-15
Al.sub.2 O.sub.3 0-5
Fe.sub.3 O.sub.4 0-10
CaO 0-2
Co.sub.3 O.sub.4 0-4 where the V 2 O 5 + MoO 3 + P 2 O 5 is in the range of 70 to 90 weight percent; gradually filling the thoroughly mixed ingredients into a crucible preheated to at least 2000°F; heating the filled crucible to above the melting temperature of the ingredients; maintaining the temperature until all of the ingredients are melted; stirring the resulting melt to assure homogeniety; casting the melt in a mold preheated to a temperature above the strain point of the glass; and annealing the case glass.
Claim 10
Independent Claim
138 words
A method of manufacturing a semiconducting glass composition comprising: thoroughly mixing the following ingredients where the ingredients are present in the following ranges as given in weight percent: V.sub.2 O.sub.5 25-35
MoO.sub.3 35-45
P.sub.2 O.sub.5 10-20
BaO 0-15
Al.sub.2 O.sub.3 0-5
Fe.sub.3 O.sub.4 0-10
CaO 0-2
Co.sub.3 O.sub.4 0-4 where the V 2 O 5 + MoO 3 + P 2 O 5 is in the range of 70 to 90 weight percent; gradually filling the thoroughly mixed ingredients into a crucible preheated to at least 2000°F; heating the filled crucible to above the melting temperature of the ingredients; maintaining the temperature until all of the ingredients are melted; stirring the resulting melt to assure homogeniety; casting the melt in a mold preheated to a temperature above the strain point of the glass; and annealing the case glass.
Claim 11
Dependent Claim
147 words
A glass composition consisting essentially of: about 70 to 90 weight percent of the essential ingredients V 2 O 5 , MoO 3 , and P 2 O 5 ; the V 2 O 5 being present in an amount ranging from 27.8 to 50 weight percent of the essential ingredients; the MoO 3 being present in an amount ranging from 38.9 to 64.3 weight percent of the essential ingredients; and the P 2 O 5 being present in an amount ranging from 11.3 to 28.6 weight percent of the essential ingredients; about 2 to 10 weight percent of at least one modifying oxide selected from the group consisting of Fe 3 O 4 and Co 3 O 4 ; and about 3 to 20 weight percent of at least one modifying oxide selected from the group consisting of BaO, Al 2 O 3 , and CaO.
Claim 12
Dependent Claim
147 words
A glass composition consisting essentially of: about 70 to 90 weight percent of the essential ingredients V 2 O 5 , MoO 3 , and P 2 O 5 ; the V 2 O 5 being present in an amount ranging from 27.8 to 50 weight percent of the essential ingredients; the MoO 3 being present in an amount ranging from 38.9 to 64.3 weight percent of the essential ingredients; and the P 2 O 5 being present in an amount ranging from 11.3 to 28.6 weight percent of the essential ingredients; about 2 to 10 weight percent of at least one modifying oxide selected from the group consisting of Fe 3 O 4 and Co 3 O 4 ; and about 3 to 20 weight percent of at least one modifying oxide selected from the group consisting of BaO, Al 2 O 3 , and CaO.
Claim 13
Dependent Claim
21 words
The invention of claim 9 wherein said modifying oxides are BaO, Al 2 O 3 and Fe 3 O 4 .
Claim 14
Dependent Claim
23 words
The invention of claim 9 wherein said modifying oxides are BaO, Fe 3 O 4 , CaO and Co 3 O 4 .
Claim 15
Dependent Claim
21 words
The invention of claim 9 wherein said modifying oxides are Al 2 O 3 , and Fe 3 O 4 .
Claim 16
Dependent Claim
18 words
The invention of claim 9 wherein said modifying oxides are BaO, Fe 3 O 4 , and CaO.
Claim 17
Dependent Claim
18 words
The invention of claim 9 wherein said modifying oxides are BaO, CaO, and Co 3 O 4 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |