BISMUTH SYSTEM OXIDE SUPERCONDUCTIVE WIRE ROD, ITS MANUFACTURING METHOD AND SUPERCONDUCTIVE APPARATUS

摘要

PPROBLEM TO BE SOLVED: To provide a bismuth system oxide superconductive wire rod having excellent properties and its manufacturing method by smoothing cracks or irregularities generated at intermediate rolling. PSOLUTION: The manufacturing method of a bismuth system oxide superconductive wire rod includes a process of filling a bismuth system oxide superconductive wire rod raw material containing a superconductive phase into a metal sheath, putting the metal sheath under plastic processing and heat treatment at least once and making a ratio of Bi2223 phase 92% or less, an intermediate rolling process, and a sintering process to smooth irregularities of the Bi2223 phase. PCOPYRIGHT: (C)2006,JPO&NCIPI