Method of preparing bismuth oxide superconducting wire

Details Method of preparing bismuth oxide superconducting wire Method of preparing bismuth oxide superconducting wire

H - Electricity

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H01B 13/00 (2006.01) B21L 1/00 (2006.01) B21L 9/00 (2006.01) C01G 29/00 (2006.01) H01B 1/08 (2006.01) H01B 12/04 (2006.01) H01L 39/24 (2006.01)

Patent

CA 2092180

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 supercon- ductor of the obtained bismuth based oxide superconductive wire material, and thereby, the magnetic field characteristic of the critical current density is improved.

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