US3948813A
Expired / Lapsed
US
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Oxygen sensitive, refractory oxide composition
Assignee: Energy Research and Development Administration ERDA
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Filing: 1974-12-02
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Granted: 1976-04-06
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Expires: 1994-12-02
Abstract
Abstract Oxide compositions containing niobium pentoxide and an oxide selected from the group consisting of hafnia, titania, and zirconia have electrical conductivity characteristics which vary greatly depending on the oxygen content.
Inventors
- 👤 Cressie E. Holcombe, Jr.
- 👤 Douglas D. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:57
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4073; C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C04B37/00; C04B37/02; C04B37/021; C04B37/023; C04B37/025; C04B37/026; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/80; C04B41/81; C04B41/85; C04B41/88; H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/068; C04B2237/12; C04B2237/123; C04B2237/124; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/345; C04B2237/348; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/76; C04B2237/765
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A sintered compact composition consisting essentially of 25 to 75 mole % Nb 2 O 5 with the balance being a Group IVB dioxide, said compact being gray to black in color with an electrical resistivity of less than 10 3 ohm-cm, containing binary compounds consisting essentially of integer molar ratios of Nb 2 O 5 and said Group IVB dioxide and being capable of direct electrodeposition of an adjacent metallic layer and of conversion to an insulator substantially white in color when heated in air.
Claim 2
Dependent Claim
86 words
A sintered compact composition consisting essentially of 25 to 75 mole % Nb 2 O 5 with the balance being a Group IVB dioxide, said compact being gray to black in color with an electrical resistivity of less than 10 3 ohm-cm, containing binary compounds consisting essentially of integer molar ratios of Nb 2 O 5 and said Group IVB dioxide and being capable of direct electrodeposition of an adjacent metallic layer and of conversion to an insulator substantially white in color when heated in air.
Claim 3
Dependent Claim
15 words
The composition according to claim 1 wherein said Group IVB dioxide is HfO 2 .
Claim 4
Dependent Claim
15 words
The composition according to claim 1 wherein said Group IVB dioxide is TiO 2 .
Claim 5
Dependent Claim
15 words
The composition according to claim 1 wherein said Group IVB dioxide is ZrO 2 .
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |