Ceramic component for MHD electrode
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsDavid D. Marchant, Junior L. Bates
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Abstract
A ceramic component which exhibits electrical conductivity down to near room temperatures has the formula: Hf.sub.x In.sub.y A.sub.z O.sub.2 where x=0.1 to 0.4, y=0.3 to 0.6, z=0.1 to 0.4 and A is a lanthanide rare earth or yttrium. The component is suitable for use in the fabrication of MHD electrodes or as the current leadout portion of a composite electrode with other ceramic components.
Claims5
A ceramic component for an MHD generator electrode having the formula:
- Hf.sub.x In.sub.y A.sub.z O.sub.2 where x=0.1 to 0.4, y=0.3 to 0.6, z=0.1 to 0.4 and A is one or more elements selected from the group consisting of yttrium, ytterbium, terbium, praseodynium and cerium.
A composite electrode for use in a magnetohydrodynamic generator comprising:
- a base portion constructed of a ceramic component having the formula:
- Hf.sub.x In.sub.y A.sub.z O.sub.2 wherein x=0.1 to 0.4, y=0.3 to 0.5, z=0.2 to 0.4 and A is one or more elements selected from the group consisting of yttrium, ytterbium, terbium, praseodynium and cerium, and
- a cap portion attached to the base, the cap being constructed of a ceramic component selected from the group consisting of stabilized zirconium oxide, stabilized hafnium oxide and terbium stabilized hafnium.
An electrode for use in a magnetohydrodynamic generator comprising:
- a ceramic component having the formula:
- Hf.sub.x In.sub.y A.sub.z O.sub.2 where x=0.1 to 0.4, y=0.3 to 0.6, z=0.1 to 0.4 and A is one or more elements selected from the group consisting of yttrium, ytterbium, terbium, praseodynium and cerium.
Dependencies are inferred from the claim text.