Patent ID: 6381832
Filing Date: 2002-05-07
Classification: H01L,Y10T

Abstract:
A process for producing a superconducting wire, said process comprising the steps of:(i) providing a stacked body comprising (a) a substrate composed of (a-i) an electrically conductive material, (b) an oxide superconductor material having a desired decomposition temperature and (c) an electrically conductive material which is substantially not reactive with said oxide superconductor material (b), said electrically conductive material (c) having a melting point which is lower than that of said electrically conductive material (a-i) of said substrate (a) and which is lower than said decomposition temperature of said oxide superconductor material (b), and said stacked body having a structure in which said substrate (a) is shaped in a hollow tubular form whose inner wall face is covered by said electrically conductive material (c) and whose inside space is filled with said oxide superconductor material (b); (ii) subjecting said stacked body to heat treatment to heat-fuse said electrically conductive material (c) of said stacked body to thereby impregnate said electrically conductive material (c) into said oxide superconductor material (b) of said stacked body such that gaps among crystal grains contained in said oxide superconductor material (b) are filled with said electrically conductive material (c); and (iii) subjecting a product obtained in said step (ii) to wire-drawing treatment at a temperature at which said electrically conductive material (c) becomes partially fused, or at a higher temperature, wherein said step (iii) can be conducted simultaneously with or after said step (ii).