摘要 |
In a method of preparing an oxide superconducting wire comprising the steps of filling up raw material powder for an oxide superconductor in a metal sheath, performing first rolling in this state for working the metal sheath into a tape, performing first heat treatment, then performing second rolling and further performing second heat treatment, diameters of rolls employed for the second rolling are made larger by at least 5 cm than those of rolls employed for the first rolling, in order to improve the critical current density of the as-formed oxide superconducting wire over its longitudinal direction. |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD., OSAKA, JP |
发明人 |
HIKATA, TAKESHI, C/O OSAKA WORKS, KONOHANA-KU, OSAKA-SHI, OSAKA, JP;SATO, KENICHI, C/O OSAKA WORKS, KONOHANA-KU, OSAKA-SHI, OSAKA, JP |