Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconducting wire – tape – cable – or fiber – per se
Patent
1994-08-01
1997-09-23
Yamnitzky, Marie
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconducting wire, tape, cable, or fiber, per se
505236, 505701, 505704, 428689, 428701, 428702, 428930, H01L 3912
Patent
active
056704593
ABSTRACT:
In a bismuth oxide superconductor having a composition of Bi-Sr-Ca-Cu or (Bi,Pb)-Sr-Ca-Cu and being covered with a metal sheath, the a-b plane of a 2223 phase, which is a 110 K phase, is oriented along the longitudinal direction as a matrix, while a dispersed superconducting phase mainly consisting of a 2212 phase, which is a 80 K phase, and/or non-superconducting phases is dispersed along the a-b plane in the 2223 phase, so that a magnetic field property of its critical current density is extremely improved. In order to prepare such a bismuth oxide superconductor, performed are the steps of preparing raw material which is based on a 2223 composition in Bi-Sr-Ca-Cu or (Bi,Pb)-Sr-Ca-Cu in relation to blending/composition, consisting as a superconducting phase of mainly a 2212 phase and non-superconducting phases in relation to the crystal structure, covering the raw material with a metal sheath, and performing deformation processing and heat treatment on the composite.
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Hikata Takeshi
Sato Ken'ichi
Sumitomo Electric Industries Ltd.
Yamnitzky Marie
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