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    • 7. 发明专利
    • INSULATED SUPERCONDUCTIVE WIRE
    • JPS5990905A
    • 1984-05-25
    • JP20074582
    • 1982-11-16
    • HITACHI CABLE
    • MORIAI HIDESUMINOGUCHI KOUJIMASUKO RIYOUICHIKOIKE TOMOYUKI
    • H01B12/02H01F6/06
    • PURPOSE:To obtain a stable superconductive coil which is free from short- circuiting between the adjacent turns of the coil wire and is efficiently cooled by a refrigerant, by partially coating the surface of a superconductive wire with a thin insulator before an insulating tape is spirally wound on the wire at a spacing. CONSTITUTION:The surface of a superconductive wire 1 of circular cross-section is longitudinally coated with a thin insulator having a width substantially equal to a half of the circumference of the wire 1, e.g., a tape 2 with a thickness on the order of 0.15mm. which is formed by coating a polyimide film with a thermosetting resin. An insulating tape 3 larger in thickness than the tape 2 is spirally wound on the periphery of the wire 1 at a spacing. A coil made from such insulated superconductive wire will be free from short-circuiting between the adjacent turns of the wire 1 owing to the existence of the thin insulator 2 if the portions of the wire 1 which are not coated with the spiral insulating tape 3 should contact each other. Moreover, the surface of the wire 1 is partially exposed, and the exposed portion contacts, for example, liquid helium, thereby allowing efficient cooling.