US5266419A
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US
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Method of producing an air electrode material for solid electrolyte type fuel cells
Assignee: NGK Insulators Ltd
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Filing: 1991-07-08
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Granted: 1993-11-30
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Expires: 2011-07-08
Abstract
Abstract A method of producing a self-supporting air electrode for a solid electrolyte fuel cell, including the steps of mixing lanthanum or a lanthanum compound, manganese or a manganese compound, and metal A or a compound thereof into a mixture, wherein A is selected from the group consisting of Sr, Ca, Mg, Y, Ce, Yb, Zn and Ba and pre-firing the mixture at a temperature of at least 1400° C. to yield a synthesized product of La 1-x A x MnO 3 wherein 0<x ≦0.5 and forming the synthesized product into a green body and firing the green body to form a self-supporting air electrode body consisting of La 1-x A x MnO 3 .
Inventors
- 👤 Hirotake Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:19
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/12; C01G45/1221; C01G45/125; C01G45/1264; C04; C04B; C04B35/00; C04B35/01; C04B35/016; H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; H01M4/9025; H01M4/9033; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A method of producing a self-supporting air electrode for a solid electrolyte fuel cell, comprising the steps of: mixing lanthanum or a lanthanum compound, manganese or a manganese compound, and metal A or a compound thereof into a mixture, wherein A is selected from the group consisting of Sr, Ca, Mg, Y, Ce, Yb, Zn and Ba; pre-firing the mixture at a temperature of at least 1400° C. to yield a synthesized product of La 1-x A x MnO 3 wherein 0<x≦0.5; forming the synthesized product into a green body; and firing said green body to form a self-supporting air electrode body consisting of La 1-x A x MnO 3 .
Claim 2
Independent Claim
111 words
A method of producing a self-supporting air electrode for a solid electrolyte fuel cell, comprising the steps of: mixing lanthanum or a lanthanum compound, manganese or a manganese compound, and metal A or a compound thereof into a mixture, wherein A is selected from the group consisting of Sr, Ca, Mg, Y, Ce, Yb, Zn and Ba; pre-firing the mixture at a temperature of at least 1400° C. to yield a synthesized product of La 1-x A x MnO 3 wherein 0<x≦0.5; forming the synthesized product into a green body; and firing said green body to form a self-supporting air electrode body consisting of La 1-x A x MnO 3 .
Claim 3
Independent Claim
128 words
A method of producing a self-supporting air electrode for a solid electrolyte fuel cell, comprising the steps of: mixing lanthanum or a lanthanum compound, manganese or a manganese compound, and metal A or a compound thereof into a mixture, wherein A is selected from the group consisting of Sr, Ca, Mg, Y, Ce, Yb, Zn and Ba; forming the mixture into a first green body; pre-firing said first green body at a temperature of at least 1400° C. to yield a synthesized product of La 1-x A x MnO 3 wherein 0<x ≦0.5; pulverizing said synthesized product into a powder; forming said powder into a second green body; firing said second green body to form a self-supporting air electrode consisting of La 1-x A x MnO 3 .
Claim 4
Independent Claim
128 words
A method of producing a self-supporting air electrode for a solid electrolyte fuel cell, comprising the steps of: mixing lanthanum or a lanthanum compound, manganese or a manganese compound, and metal A or a compound thereof into a mixture, wherein A is selected from the group consisting of Sr, Ca, Mg, Y, Ce, Yb, Zn and Ba; forming the mixture into a first green body; pre-firing said first green body at a temperature of at least 1400° C. to yield a synthesized product of La 1-x A x MnO 3 wherein 0<x ≦0.5; pulverizing said synthesized product into a powder; forming said powder into a second green body; firing said second green body to form a self-supporting air electrode consisting of La 1-x A x MnO 3 .
Claim 5
Dependent Claim
16 words
The method of claim 2, wherein said powder has an average particle size of 1-10 μm.
References Cited (Backward Citations)
FR2099542A1
Cited
FR2315151A1
Cited
FR2347783A1
Cited
DE2738756A1
Cited
EP0188868A1
Cited
EP0194380A2
Cited
EP0395399A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |