US3998375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding of metals to solid electrolytes
Assignee: Elster Metering Holdings Ltd
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Filing: 1975-12-05
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Granted: 1976-12-21
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Expires: 1995-12-05
Abstract
Abstract A method of bonding metal particles to solid electrolytic material, suitably for making an electrolytic cell for measuring the oxygen content of gases. In a first stage of the method thin, generally flat metal particles are applied to a surface of the electrolyte and bonded to the surface by heating. In a second stage, further metal particles are bonded to the particles applied in the first stage. The further particles are thicker in relation to their other dimensions than are the particles employed in the first stage.
Inventors
- 👤 Derek Austen Rudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:34
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; H01M8/1213; H01M4/00; H01M4/86; H01M4/90; H01M4/9041; H01M4/905; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
A method of bonding metals to solid electrolytic material which comprises applying a first layer comprising thin generally flat metal particles to a surface of the material, heating to bond the metal particles in the first layer to the surface, applying to the said metal particles from the first layer a second layer comprising further metal particles, each of the further metal particles having a thickness which is greater in relation to the other dimensions of the particle than is the case for the metal particles from the first layer, and heating to bond the further metal particles in the second layer to the metal particles from the first layer.
Claim 2
Independent Claim
110 words
A method of bonding metals to solid electrolytic material which comprises applying a first layer comprising thin generally flat metal particles to a surface of the material, heating to bond the metal particles in the first layer to the surface, applying to the said metal particles from the first layer a second layer comprising further metal particles, each of the further metal particles having a thickness which is greater in relation to the other dimensions of the particle than is the case for the metal particles from the first layer, and heating to bond the further metal particles in the second layer to the metal particles from the first layer.
Claim 3
Dependent Claim
31 words
A method as claimed in claim 1, wherein the metal particles in the first layer have a thickness of approximately 0.5 μ and other dimensions between 1 μ and 10 μ.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 2, wherein the further particles in the second layer have dimensions of approximately 10 μ in each of three mutually perpendicular directions.
Claim 5
Dependent Claim
35 words
A method as claimed in claim 1, in which the first layer is applied to the surface of the material in the form of a paste comprising metal particles suspended in a solvent and binder.
Claim 6
Dependent Claim
29 words
A method as claimed in claim 1, wherein the second layer is applied in the form of a paste comprising further metal particles suspended in a solvent and binder.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 1, wherein the solid electrolytic material is zirconia or zirconia stabilised with lime or yttria.
Claim 8
Dependent Claim
19 words
A method as claimed in claim 1, in which the metal particles and the further metal particles are platinum.
Claim 9
Dependent Claim
35 words
A method as claimed in claim 7, in which the first layer is heated to a temperature of 1,050° C to 1,500° C in order to sinter and bond the metal particles to the material.
Claim 10
Dependent Claim
40 words
A method as claimed in claim 7, in which the second layer is heated to a temperature of 1,050° C to 1,550° C in order to sinter and bond the further particles to the metal particles from the first layer.
Claim 11
Dependent Claim
19 words
A method as claimed in claim 8, wherein heating is effected for a period between 1 and 3 hours.
Claim 12
Dependent Claim
17 words
A solid electrolytic material having a metal bonded thereto by the method as claimed in claim 1.
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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |