Superconductor technology: apparatus – material – process – High temperature – per se – Free metal containing
Patent
1995-01-19
1996-08-20
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature , per se
Free metal containing
505234, 505236, 505238, 505450, 505781, 505785, 505919, 252521, 428114, 428212, C04B 35505, C04B 35622, C04B 35653
Patent
active
055479219
ABSTRACT:
A superconducting film including 0.1-5% by weight of magnesium oxide wherein the superconducting film has a thickness in a range from 300 to 1000 .mu.m. A superconducting device for magnetic shielding comprises: a substrate; and a superconducting layer supported by the substrate, the superconducting layer including grains of a Bi-type superconducting oxide so that the superconducting layer has a critical temperature higher than -196.degree. C., the superconducting layer having a thickness in a range from 300 to 1,000 .mu.m, the superconducting layer including 0.1-5% by weight of magnesium oxide, where the superconducting device has a laminated structure including the substrate and the superconducting layer. A process for producing a superconducting film comprises the steps of: firing a mixture of calcined powders of a superconducting oxide and 0.1-5% by weight of magnesium oxide powders at a temperature at which the superconducting oxide is partially melted.
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Hayase Tooru
Matsuda Kazuyuki
Shimizu Hideki
Tani Makoto
Kopec M.
Lieberman Paul
NGK Insulators Ltd.
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