US4394280A
Expired / Lapsed
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Ion conductive mixed crystal
Assignee: VARTA Batterie AG
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Filing: 1982-04-19
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Granted: 1983-07-19
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Expires: 2002-04-19
Abstract
Abstract A mixed crystal of the general composition Na1+axZr2+22/3x-axSixP3-xO12-2/3x with 0.8</=a</=0.9 and 1.8</=x</=2.3, has a particularly favorable Na-ion conductivity, particularly when a=0.88 and x=2.2. This makes its use desirable as the solid electrolyte in Na/S cells. The high density of the single phase monoclinic crystallized material, which reaches almost 3.10 g/cm3, is the result of high temperature sintering, carried out in pure oxygen.
Inventors
- 👤 Ulrich von Alpen
- 👤 Reinhard Brautigam
- 👤 Antony Oliapuram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/447; C04B35/48; C04B35/481; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; H01M6/00; H01M6/14; H01M6/18; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3231; C04B2235/3244; C04B2235/34; C04B2235/3418; C04B2235/44; C04B2235/447; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
71 words
A mixed crystal for use as the ion conductive solid electrolyte in galvanic elements formed of the components Na 2 O, ZrO 2 , P 2 O 5 and SiO 2 , wherein the composition is expressed by the general formula Na.sub.1+ax Zr.sub.2+2/3x-ax Si.sub.x P.sub.3-x O.sub.122/3x, a being a constant with a numerical value between 0.8 and 0.9 and x being a variable parameter with numerical values of 1.8 to 2.3.
Claim 2
Dependent Claim
71 words
A mixed crystal for use as the ion conductive solid electrolyte in galvanic elements formed of the components Na 2 O, ZrO 2 , P 2 O 5 and SiO 2 , wherein the composition is expressed by the general formula Na.sub.1+ax Zr.sub.2+2/3x-ax Si.sub.x P.sub.3-x O.sub.122/3x, a being a constant with a numerical value between 0.8 and 0.9 and x being a variable parameter with numerical values of 1.8 to 2.3.
Claim 3
Dependent Claim
20 words
The mixed crystal of claim 1 wherein x has the numerical value 2.2 and a has the numerical value 0.88.
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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |