Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Using an organometallic intermediate
Patent
1995-08-14
1997-09-09
King, Roy V.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Using an organometallic intermediate
505445, 505510, 505734, 427 62, 427226, B05D 512, B05D 302
Patent
active
056656823
ABSTRACT:
An oxide superconductor capable of realizing a high critical current density and its manufacturing method requiring only a low temperature heat treatment. An oxide superconductor has a superconductive layer with a composition of RE.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x, where RE stands for any one of rare earth elements including Y, Eu, Gd, Dy, Ho, Er, and Yb, which is formed on the substrate by RE.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x phase and CuO phase resulting from a decomposition of RE.sub.1 Ba.sub.2 Cu.sub.4 O.sub.8 phase, in which the CuO phase and micro-defects caused by the decomposition function as pinning centers. This superconductive layer is formed by applying a solution containing organic compounds of a plurality of metallic elements for constituting the oxide superconductive layer; calcining the substrate applied with the solution to obtain a calcined body in which the organic compounds contained in the solution are thermally decomposed; heating the calcined body to produce RE.sub.1 Ba.sub.2 Cu.sub.4 O.sub.8 phase; and decomposing the RE.sub.1 Ba.sub.2 Cu.sub.4 O.sub.8 phase into RE.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x phase and CuO phase, to obtain the oxide superconductor.
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Kume Atsushi
Okamura Osamu
Shiohara Yuh
Fujikura Ltd.
International Superconductivity Technology Center
King Roy V.
The Kansai Electric Power Co. Inc.
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