| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of an oxide superconductive wire rod in which superconductive characteristics can be improved. SOLUTION: The manufacturing method of the oxide superconductive wire rod is equipped with a filling process in which a precursor powder of Bi2223 superconductor is filled into a metal tube, a wire-drawing process in which the metal tube filled with the precursor powder is wire-drawn to obtain the wire rod, a rolling process in which the wire rod after the wire-drawing process is rolled, and a heat-treatment process in which the wire rod after the rolling process is heat-treated. The heat treatment process consists of a first step in which temperature is ascended to a range between 750°C or more and 800°C or less, a second step in which it is decscended by 20°C or more from the highest temperature in the first step, and a third step in which a heat treatment is carried out within a temperature range between 800°C or more and 870°C or less. COPYRIGHT: (C)2009,JPO&INPIT |
