US4514277A
Expired / Lapsed
US
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Oxygen sensor element
Assignee: UNIFRUCO Ltd
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Filing: 1982-09-30
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Granted: 1985-04-30
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Expires: 2002-09-30
Abstract
Abstract An oxygen sensor element having an oxygen ion-permeable solid electrolyte having a tabular or columnar shape and electrode layers formed on the solid electrolyte. At least one of the electrode layers is composed of a fired body having a uniform structure consisting of 100 weight parts of a metal and 0.1 to 10 weight parts of a glass which consists of the following materials in molar amounts: SiO 2 , 62-75%; ZrO 2 , 7-11%; R 2 O, 13-23%; R'O, 1-10%; Al 2 O 3 , 0-4%; B 2 O 3 , 0-6%; Fe 2 O 3 , 0-5%; CaF 2 , 0-2%; and TiO 2 , 0-4%; wherein R 2 O is Na 2 O which is substantially pure or is substituted by Li 2 O within 2 mole percent thereof, and R'O is an oxide selected from the group consisting of the alkaline-earth metal oxides, ZnO and MnO. Disclosed also is a method of producing the oxygen sensor element.
Inventors
- 👤 Shigenori Sakurai
- 👤 Takashi Kamo
- 👤 Toshinobu Furutani
- 👤 Shirou Kimura
- 👤 Yoshio Torisu
- 👤 Mari Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:27
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
An oxygen sensor element of an oxygen sensor of an oxygen concentration cell comprising an oxygen ion-permeable solid electrolyte shaped in a tabular or columnar shape, with electrode layers formed on both sides of said solid electrolyte, wherein at least one of said electrode layers consists of a uniform fired body containing 100 weight parts of metal powder and 0.1 to 10 weight parts of glass powder consisting of particles having a diameter of 5 to 20 micrometers, and wherein said glass powder consists of reinforcing glass fiber for cement, which consists of the following materials in molar amounts: SiO 2 , 62-75%; ZrO 2 , 7-11%; R 2 O, 13-23%; R'O, 1-10%, Al 2 O 3 , 0-4%; B 2 O 3 , 0-6%; Fe 2 O 3 , 0-5%, CaF 2 , 0-2%; and TiO 2 , 0-4%; wherein R 2 O is Na 2 O which is substantially pure or is substituted by Li 2 O within 2 mole percent thereof, and R'O is an oxide selected from the group consisting of the alkaline-earth metal oxides, ZnO and MnO.
Claim 2
Dependent Claim
182 words
An oxygen sensor element of an oxygen sensor of an oxygen concentration cell comprising an oxygen ion-permeable solid electrolyte shaped in a tabular or columnar shape, with electrode layers formed on both sides of said solid electrolyte, wherein at least one of said electrode layers consists of a uniform fired body containing 100 weight parts of metal powder and 0.1 to 10 weight parts of glass powder consisting of particles having a diameter of 5 to 20 micrometers, and wherein said glass powder consists of reinforcing glass fiber for cement, which consists of the following materials in molar amounts: SiO 2 , 62-75%; ZrO 2 , 7-11%; R 2 O, 13-23%; R'O, 1-10%, Al 2 O 3 , 0-4%; B 2 O 3 , 0-6%; Fe 2 O 3 , 0-5%, CaF 2 , 0-2%; and TiO 2 , 0-4%; wherein R 2 O is Na 2 O which is substantially pure or is substituted by Li 2 O within 2 mole percent thereof, and R'O is an oxide selected from the group consisting of the alkaline-earth metal oxides, ZnO and MnO.
Claim 3
Dependent Claim
119 words
An oxygen sensor element of an oxygen sensor of an oxygen concentration cell comprising an oxygen ion-permeable solid electrolyte shaped in a tabular or columnar shape, with electrode layers formed on both sides of said solid electrolyte, wherein at least one of said electrode layers consists of a uniform fired body containing 100 weight parts of metal powder and 0.1 to 10 weight parts of glass powder consisting of particles having a diameter of 5 to 20 micrometers, wherein said glass powder consists of reinforcing glass fiber for cement, which consists of the following materials in molar amounts: SiO 2 , 62.7%; Na 2 O, 14.7%; CaO, 5.4%; ZrO 2 , 16.6%; and Al 2 O 3 , 0.53%.
Claim 4
Dependent Claim
119 words
An oxygen sensor element of an oxygen sensor of an oxygen concentration cell comprising an oxygen ion-permeable solid electrolyte shaped in a tabular or columnar shape, with electrode layers formed on both sides of said solid electrolyte, wherein at least one of said electrode layers consists of a uniform fired body containing 100 weight parts of metal powder and 0.1 to 10 weight parts of glass powder consisting of particles having a diameter of 5 to 20 micrometers, wherein said glass powder consists of reinforcing glass fiber for cement, which consists of the following materials in molar amounts: SiO 2 , 62.7%; Na 2 O, 14.7%; CaO, 5.4%; ZrO 2 , 16.6%; and Al 2 O 3 , 0.53%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |