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EP0194380A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Support tubes for electrochemical cells

Assignee: Westinghouse Electric Corp
•
Filing: 1985-11-21
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Granted: —
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Expires: 2005-11-21
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Abstract

Abstract Compounds having a fluorite-like structure comprising a solid solution having the general formula ; where MO s is calcia, yttria, a rare earth oxide, or mixtures thereof, x is from 0.1 to 0.3, y is from 0.005 to 0.06, z is from 0.1 to 1.9, A is yttrium, a rare earth element, an alkaline earth element, or mixture thereof, B is iron, nickel, cobalt, or mixtures thereof, m is 0.3 to 1, n is 0.5 to 1, and r is 2 to 4. A porous tube made from such compositions can be coated with an electrically conducting mixed oxide electrode such as lanthanum manganite, and can be used in making high temperature electro-chemical cells such as solid electrolyte fuel cells.

Inventors

  • 👤 Roswell John Ruka
  • 👤 Barry Robert Rossing

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 11:22
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/486; H01M8/1213; H01M8/1226; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 88 words
A compound having a fluorite-like structure characterized in that said compound comprises a solid solution having the general formula where MO s is calcia, yttria, a rare earth oxide, or mixtures thereof, x is from 0.1 to 0.3, y is from 0.005 to 0.06, z is from 0.1 to 1.9, A is yttrium, a rare earth element, an alkaline earth element, or mixtures thereof, B is Fe, Ni, Co, or mixtures thereof, m is 0.3 to 1, n is 0.5 to 1, and r is 2 to 4.
Claim 2
Dependent Claim 88 words
A compound having a fluorite-like structure characterized in that said compound comprises a solid solution having the general formula where MO s is calcia, yttria, a rare earth oxide, or mixtures thereof, x is from 0.1 to 0.3, y is from 0.005 to 0.06, z is from 0.1 to 1.9, A is yttrium, a rare earth element, an alkaline earth element, or mixtures thereof, B is Fe, Ni, Co, or mixtures thereof, m is 0.3 to 1, n is 0.5 to 1, and r is 2 to 4.
Claim 3
Dependent Claim 13 words
A compound according to claim 1, characterized in that x is about 0.15.
Claim 4
Dependent Claim 13 words
A compound according to claim 1, wherein z is from 0.5 to 1.5.
Claim 5
Dependent Claim 24 words
A support tube for an electrochemical cell characterized in that said tube is made from a compound according to claim 1, 2 or 3.
Claim 6
Dependent Claim 20 words
A support tube according to claim 4, characterized in that said tube has a ceramic coating on the outside thereof.
Claim 7
Dependent Claim 28 words
A support tube according to claim 5, characterized in that the coating is electronically conductive and comprises a solid solution having a perovskite-like crystal structure which contains manganese.
Claim 8
Dependent Claim 34 words
A support tube according to claim 7, characterized in that the coating has the general formula where w is from 0.1 to 0.7, v is 0 to 1, and a is up to 0.1.
Claim 9
Dependent Claim 21 words
A support tube according to any of claims 4 to 7, characterized in that said tube is closed at one end.
Claim 10
Dependent Claim 25 words
A support tube according to any of claims 4 to 8, characterized in that said tube has been sintered at a temperature greater than 1600°C.

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