High strength porous support tubes for high temperature solid electrolyte electrochemical cells
First Claim
1. A high temperature electrochemical cell comprising an electrode, a separate solid oxide electrolyte and a separate porous, sintered material supporting said electrolyte and electrode, said porous, sintered material comprising a mixture of thermally stable oxide powder particles and thermally stable oxide fibers, where the oxide powder particles and the oxide fibers are sintered together in interlocking contact, said fibers being thermally stable up to about 1700°
- C., and comprising from about 3 wt. % to about 45 wt. % of the sintered material.
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Abstract
A high temperature, solid electrolyte electrochemical cell is made, having an electrode and a solid electrolyte disposed on a porous, sintered support material containing thermally stabilized zirconia powder particles and from about 3 wt. % to about 45 wt. % of thermally stable oxide fibers.
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Citations
12 Claims
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1. A high temperature electrochemical cell comprising an electrode, a separate solid oxide electrolyte and a separate porous, sintered material supporting said electrolyte and electrode, said porous, sintered material comprising a mixture of thermally stable oxide powder particles and thermally stable oxide fibers, where the oxide powder particles and the oxide fibers are sintered together in interlocking contact, said fibers being thermally stable up to about 1700°
- C., and comprising from about 3 wt. % to about 45 wt. % of the sintered material.
- View Dependent Claims (2)
- 3. In a high temperature, solid electrolyte electrochemical cell having two electrodes with a separate solid electrolyte therebetween, where one of the electrodes is disposed on a separate porous, sintered, support material comprising zirconia powder particles, the improvement comprising inclusion in the sintered support material of from about 3 wt. % to about 45 wt. % of thermally stable oxide fibers, where the coefficient of thermal expansion of the oxide fibers approximates that of the zirconia powder particles, and the zirconia powder particles and the oxide fibers are sintered together in interlocking contact, said fibers being thermally stable up to about 1700°
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8. A high temperature, solid electrolyte, tubular fuel cell comprising:
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(1) a porous, sintered, support tube comprising zirconia powder particles and from about 3 wt. % to about 45 wt. % of thermally stable oxide fibers, where the zirconia powder particles and the oxide fibers are sintered together in interlocking contact, said fibers being thermally stable up to about 1700°
C.,(2) a separate first electrode disposed on the support, (3) a separate second electrode spaced away from the first electrode, and (4) a separate solid electrolyte disposed between the first electrode and the second electrode. - View Dependent Claims (9, 10, 11, 12)
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Specification