US4080276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas sensor with protective coating and method of forming same
Assignee: Bendix Corp
•
Filing: 1977-04-25
•
Granted: 1978-03-21
•
Expires: 1997-04-25
Abstract
Abstract A solid electrolyte oxygen sensor has a protective coating to protect a catalyst or conductive film thereon, which coating is formed as an inorganic reaction product of an oxide material and an inorganic acid which forms a matrix to bond the oxide material as an adherent coating over the film.
Inventors
- 👤 James Daniel Bode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:06
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; G01N27/4077; H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9041; H01M4/905; H01M4/9058; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
119 words
In a process for the formation of an electrode element for sensing oxygen, the electrode element comprising a solid electrolyte body for transferring oxygen ions, the body having an inner surface having conductive means thereon and an outer surface having a conductive film thereon, the improvement comprising: forming a porous protective coating of an oxide over the film without subjecting the film to sintering temperatures for the coating by mixing at least a portion of the oxide material with an inorganic acid which reacts therewith, depositing the oxide on said outer surface and heating the oxide material including said portion to form an inorganic reaction product matrix to bond discrete oxide material as an adherent coating on the film.
Claim 2
Dependent Claim
119 words
In a process for the formation of an electrode element for sensing oxygen, the electrode element comprising a solid electrolyte body for transferring oxygen ions, the body having an inner surface having conductive means thereon and an outer surface having a conductive film thereon, the improvement comprising: forming a porous protective coating of an oxide over the film without subjecting the film to sintering temperatures for the coating by mixing at least a portion of the oxide material with an inorganic acid which reacts therewith, depositing the oxide on said outer surface and heating the oxide material including said portion to form an inorganic reaction product matrix to bond discrete oxide material as an adherent coating on the film.
Claim 3
Dependent Claim
43 words
In the process for formation of an electrode element for sensing oxygen as defined in claim 1, the improvement wherein said oxide material is selected from the group consisting of aluminum oxide, zirconium dioxide, magnesium zirconate, thorium dioxide, spinel oxides, mullite and kaolin.
Claim 4
Dependent Claim
37 words
In the process for formation of an electrode element for sensing oxygen as defined in claim 1, the improvement wherein said inorganic acid is selected from phosphoric acid, hydrochloric acid, nitric acid, boric acid and silicic acid.
Claim 5
Dependent Claim
32 words
In the process for formation of an electrode element for sensing oxygen as defined in claim 1, the improvement wherein said conductive film on the outer surface is a conductive catalyst film.
Claim 6
Dependent Claim
44 words
In the process for formation of an electrode element for sensing oxygen as defined in claim 1, the improvement wherein said oxide material including said portion is heated to a temperature in the range of 100°-1000° C to form said inorganic reaction product matrix.
Claim 7
Dependent Claim
33 words
In the process for formation of an electrode element for sensing oxygen as defined in claim 1, the improvement wherein the total amount of said oxide material is mixed with said inorganic acid.
Claim 8
Dependent Claim
31 words
In the process for formation of an electrode element for sensing oxygen as defined in claim 1, the improvement wherein said oxide material contains a portion of the corresponding hydroxide material.
Claim 9
Dependent Claim
80 words
In an electrode element for sensing oxygen, the electrode element comprising a solid electrolyte body for transferring oxygen ions, the body having an inner surface with conductive means thereon and an outer surface having a conductive film thereon with a porous protective coating over said film, the improvement wherein said porous protective coating comprises a reticular structure of discrete particles of an oxide interconnected by a matrix comprising an inorganic reaction product of an inorganic acid and the oxide material.
Claim 10
Dependent Claim
80 words
In an electrode element for sensing oxygen, the electrode element comprising a solid electrolyte body for transferring oxygen ions, the body having an inner surface with conductive means thereon and an outer surface having a conductive film thereon with a porous protective coating over said film, the improvement wherein said porous protective coating comprises a reticular structure of discrete particles of an oxide interconnected by a matrix comprising an inorganic reaction product of an inorganic acid and the oxide material.
Claim 11
Dependent Claim
23 words
In an electrode element for sensing oxygen as defined in claim 8, the improvement wherein said solid electrolyte body is of zirconium dioxide.
Claim 12
Dependent Claim
27 words
In an electrode element for sensing oxygen as defined in claim 8, the improvement wherein said conductive film on the outer surface is a conductive catalyst film.
Claim 13
Dependent Claim
37 words
In an electrode element for sensing oxygen as defined in claim 8, the improvement wherein said oxide is selected from the group consisting of aluminum oxide, zirconium dioxide, magnesium zirconate, thorium dioxide, spinel oxides, mullite and kaolin.
Claim 14
Dependent Claim
28 words
In an electrode element for sensing oxygen as defined in claim 8, the improvement wherein said inorganic reaction product comprises a phosphoric acid salt of an aluminum oxide.
Claim 15
Dependent Claim
26 words
In an electrode element for sensing oxygen as defined in claim 8, the improvement wherein said oxide material contains a portion of the corresponding hydroxide material.
Claim 16
Dependent Claim
28 words
In an electrode element for sensing oxygen as defined in claim 8, the improvement wherein said inorganic reaction product comprises a hydrochloric acid salt of an aluminum silicate.
Claim 17
Dependent Claim
20 words
In an electrode element for sensing oxygen as defined in claim 14, the improvement wherein said aluminum silicate is kaolin.
References Cited (Backward Citations)
US3645875A
Cited
DE2206216A1
Cited
US3978006A
Cited
US3841987A
Cited
DE2341256A1
Cited
DE2502409A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |