Patent ID: 6194352
Filing Date: 2001-02-27
Classification: H01F,H01L,Y10S

Abstract:
A method for preparing a BSCCO 2223 multifilament composite, comprising:inducing defects into a multifilament composite comprising:precursor oxide of a BSCCO 2223 oxide superconductor forming said composite into a shape having a bending strain of greater than the critical bending strain of the oxide superconduct or composite;heating the multifilamentary composite under conditions which convert the precursor oxide into BSCCO 2223 oxide superconductor; andheating the formed composite comprising BSCCO 2223 oxide superconductor to repair microcracks introduced in the forming step, said heating step comprising:(a) heating the composite to and maintaining the composite at a temperature under conditions which partially melts the oxide superconductor such that a liquid phase coexists with a solid phase of the oxide superconductor; and(b) cooling the partially melted composite to and maintaining the composite at a temperature under conditions which recrystallize the liquid phase into BSCCC 2223 oxide superconductor phase.