| 摘要 |
PROBLEM TO BE SOLVED: To provide a superconducting wire rod manufacturing method and a superconducting wire rod increasing the degree of orientation of a superconducting phase crystal to increase the critical current density in a manufacturing method of a Bi2223 superconducting wire rod. SOLUTION: The method includes a filling step of filling a metallic tube with powder of a precursor containing a Bi2201 phase as a main superconducting phase, a drawing step of drawing the metallic tube filled with the precursor powder, a rolling step of rolling the wire rod obtained after the drawing step, and a heat-treating step of heat-treating the wire rod obtained after the rolling step. Intermediate heat treatment is added between the drawing step and rolling step such that the Bi2201 phase in the precursor power reacts with a Bi2212 phase to turn the main superconducting phase to the Bi2212 phase. COPYRIGHT: (C)2009,JPO&INPIT |
