OXIDE SUPERCONDUCTIVE TWISTED WIRE, CONDUCTOR FOR OXIDE SUPERCONDUCTIVE CABLE, AND MANUFACTURE OF OXIDE SUPERCONDUCTIVE TWISTED WIRE AND CONDUCTOR FOR OXIDE SUPERCONDUCTIVE CABLE

PROBLEM TO BE SOLVED: To provide oxide superconductive twisted wires and a conductor for an oxide superconductive cable having high critical current density, and having the shape of winding a cylindrical core material at the prescribed pitch with element wires composed of an oxide superconductive material or its precursor and silver or a silver alloy covering it. SOLUTION: Plural twisted wires are twisted using element wires composed of an oxide superconductive material or its precursor and silver or a silver alloy covering it. A cylindrical core material 12 is wound with the plural twisted wires at the prescribed pitch, and they are heat-treated to manufacture the oxide superconductive twisted wires. The oxide superconductive twisted wires are assembled on an flexible core material having the same outside diameter as the core material used before the heat-treatment, at the same pitch as before the heat-treatment, to manufacture the conductor for the oxide superconductive cable.