Method of manufacturing an encased wire of high critical temperature superconducting material

摘要

In a method for the manufacture of an encased high critical temperature superconducting wire by the "powder in tube" method, prior to the introduction of a compressed rod of superconducting material into a silver tube, the rod is heat treated so that grains of unwanted phase are reabsorbed. The tube can be drawn more easily, and strands can be produced with a regular geometry and no defects. The wire is constituted by 15 mu m to 20 mu m thick filaments (30) with a form factor of more than 60.