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    • 68. 发明专利
    • OXIDE SUPERCONDUCTIVE WIRE AND ITS CONNECTING METHOD
    • JPH10188696A
    • 1998-07-21
    • JP23211797
    • 1997-08-28
    • HITACHI LTD
    • OKADA MICHIYAFUKUSHIMA KEIJITANAKA KAZUHIDE
    • C04B35/45C01G1/00C01G29/00C30B29/22H01B12/10H01B13/00H01R4/68
    • PROBLEM TO BE SOLVED: To improve the superconductive connection state between oxide superconductive tape wires by orienting the C-axis of an oxide superconductive crystal in the longitudinal direction of a metal-coated multi-core oxide superconductive wire having a flat cross sectional shape, and continuously orienting the C-face of a crystal at the connection section between the end faces of the wires in the longitudinal direction. SOLUTION: The powder having the single Bi2 Sr2 Ca1 Cu2 Ox phase is preferably filled into a silver pipe, etc., it is machined into a multi-core wire, then it is molded into a tape shape, and it is cut in the length direction. A pair of multi-core wires, 1, 2 are butted on the upper face of a tape 3 made of the same material, they are partially fused and heat-treated for 15min at 880 deg.C in the pure oxygen atmosphere, for example, then they are gradually cooled. The C-axis of a superconductive filament 5 covered with a sheath material 4 is continuously formed at a connection section. The critical current density at the connection section is set to 1000A/mm or above, and the critical current is set to 100A or above. The end face seen from above the tape 3 may be perpendicular to the length direction, or it may have an angle.