摘要 |
A manufacturing method wherein a metal sheath is filled with a powder having a composition such that the amounts of Sr, Ca and Cu are larger than conventional so that in addition to the 2223-phase of (Bi, Pb)-Sr-Ca-Cu the phase of Sr-Ca-Cu-O may be precipitated, and then, this metal sheath is subjected to a plastic working, a primary heat treatment, another plastic working, and a secondary heat treatment in this order. A pinning point based on the phase of Sr-Ca-Cu-O is introduced into the superconductor of the obtained bismuth based oxide superconductive wire material, and thereby, the magnetic field characteristic of the critical current density is improved. <IMAGE> |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD., OSAKA, JP;JAPAN AS REPRESENTED BY DIRECTOR GENERAL OF NATIONAL RESEARCH INSTITUTE FOR METALS OF SCIENCE AND TECHNOLOGY AGENCY, TOKIO/TOKYO, JP;RESEARCH DEVELOPMENT CORP. OF JAPAN, TOKIO/TOKYO, JP |
发明人 |
KATO, TAKESHI, OSAKA WORKS OF SUMITOMO ELECTRIC, OSAKA-SHI OSAKA 554, JP;SATO, KENICHI, OSAKA WORKS OF SUMITOMO ELECTRIC, OSAKA-SHI OSAKA 554, JP |