US4539276A
Expired / Lapsed
US
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Solid electrolyte
Assignee: BBC Brown Boveri AG Germany
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Filing: 1983-12-21
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Granted: 1985-09-03
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Expires: 2003-12-21
Abstract
Abstract Solid electrolyte consisting of a ceramic of the aluminum oxide-and-sodium oxide type. The ceramic forming the solid electrolyte has a composition according to the formula ##EQU1## and consists X-ray-wise 100% of a fully stabilized β"--Al 2 O 3 phase; wherein A stands for an alkali metal, silver, hydrogen or a hydrogen-containing compound; and M I and M II are elements which furnish mono- or bivalent ions; and z 1 and z 2 have values between 0 and 1, and the sum of z 1 +2z 2 is between 0.4 and 0.9.
Inventors
- 👤 Friedrich Harbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:24
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/113; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; H01M6/00; H01M6/14; H01M6/18; H01M6/185; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A solid electrolyte ceramic having a composition according to the general formula: ##EQU6## wherein A stands for an alkali metal, silver, hydrogen or a hydrogen-containing compound; M I and M II are elements which furnish mono or bivalent ions; z 1 and z 2 each have a value of 0 to 1 with the proviso that the sum of z 1 +2z 2 is between 0.4 and 0.9 and wherein the composition consists of a fully stabilized β"--Al 2 O 3 as determined by X-ray diffraction.
Claim 2
Dependent Claim
86 words
A solid electrolyte ceramic having a composition according to the general formula: ##EQU6## wherein A stands for an alkali metal, silver, hydrogen or a hydrogen-containing compound; M I and M II are elements which furnish mono or bivalent ions; z 1 and z 2 each have a value of 0 to 1 with the proviso that the sum of z 1 +2z 2 is between 0.4 and 0.9 and wherein the composition consists of a fully stabilized β"--Al 2 O 3 as determined by X-ray diffraction.
Claim 3
Dependent Claim
18 words
Solid electrolyte ceramic according to claim 1, wherein M I stands for lithium, and M II for magnesium.
Claim 4
Dependent Claim
24 words
Solid electrolyte ceramic according to claim 1, wherein z 2 has the value 0 and z 1 has a value between 0.6 and 0.8.
Claim 5
Dependent Claim
24 words
Solid electrolyte ceramic according to claim 2, wherein z 2 has the value 0 and z 1 has a value between 0.6 and 0.8.
Claim 6
Dependent Claim
24 words
Solid electrolyte ceramic according to claim 1, wherein z 2 has a value 0 and z 1 has a value between 0.68 and 0.78.
Claim 7
Dependent Claim
24 words
Solid electrolyte ceramic according to claim 2, wherein z 2 has a value 0 and z 1 has a value between 0.68 and 0.78.
Claim 8
Dependent Claim
33 words
Solid electrolyte ceramic according to claim 1, wherein the composition has the formula: (1+z.sub.1)Na.sub.2 O; (2z.sub.1)MgO; (11z.sub.1)Al.sub.2 O.sub.3 wherein z 1 has a value between 0.6 and 0.8 and z 2 is 0.
Claim 9
Dependent Claim
33 words
Solid electrolyte ceramic according to claim 2, wherein the composition has the formula: (1+z.sub.1)Na.sub.2 O; (2z.sub.1)MgO; (11z.sub.1)Al.sub.2 O.sub.3 wherein z 1 has a value between 0.6 and 0.8 and z 2 is 0.
Claim 10
Dependent Claim
17 words
Solid electrolyte ceramic according to claim 7, wherein the composition has the formula: Na.sub.1.73 Mg.sub.0.73 Al.sub.10.27 O.sub.17.
Claim 11
Dependent Claim
17 words
Solid electrolyte ceramic according to claim 8, wherein the composition has the formula: Na.sub.1.73 Mg.sub.0.73 Al.sub.10.27 O.sub.17.
References Cited (Backward Citations)
US4113928A
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US4138455A
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US4117056A
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US4197365A
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US4425415A
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |