Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconductor layer next to free metal containing layer
Patent
1995-02-15
1995-11-28
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconductor layer next to free metal containing layer
505100, 505230, 505432, 505783, 505124, 505785, 252518, 252521, 428547, 428553, 428164, 4285395, H01B 1200, H01L 3912
Patent
active
054708214
ABSTRACT:
Composite bulk superconducting materials having desirable physical, measured transport current density and high T.sub.c superconducting characteristics are provided which comprise a first matrix of superconducting ceramic oxide crystalline grains with a second matrix of elemental metal (gold, silver, palladium and tin) situated within the interstices between the crystalline grains. Preferably, each matrix is a continuous phase within the composite material, with the ceramic oxide preferably being present at a level of at least about 80% by weight, whereas the elemental metal is present at a level of up to about 20% by weight. In fabrication procedures, a precursor superconducting ceramic oxide is first prepared and reduced to a fine powder size; this is mixed with powdered elemental metal, and the mixture is compressed using high compaction pressures on the order of 14 tons/cm.sup.2 or greater to form a body, which is then sintered to yield the composite. Particularly preferred composites include a mixed metallic matrix including respective quantities of tin and a noble metal.
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Fei Xin
Kao Yi-Han
Wong Kai W.
Xin Ying
Kopec M.
Lieberman Paul
Midwest Superconductivity Inc.
The University of Kansas
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