PRODUCTION OF OXIDE SUPERCONDUCTOR

摘要

PURPOSE:To obtain the subject superconductor having excellent characteristics by heat treating a mixed powder containing a specified powder and having a composition of the above-mentioned oxide superconductor at a prescribed and comparatively low temperature for a comparatively short time. CONSTITUTION:A solid phase (e.g. Y2O3) existing together with a liquid phase when a Y-based oxide superconductor (e.g. Y-Ba-Cu-O-based oxide) is heated at >= a prescribed temperature is used as the core and the core is covered with a substance (e.g. BaCuO2) containing elements capable of a reaction with the above-mentioned core and production of the above-mentioned oxide superconductor thereby. The above obtained powder is then blended with another powder and the resultant mixed powder (e.g. mixed powder containing both BaCuO2 powder and CuO powder) containing the above-mentioned powder and having the composition of the above-mentioned oxide superconductor is heat treated at a temperature in the neighborhood of the melting point of the above- mentioned covering material.