RE-BARIUM-COPPER-OXYGEN-BASED SUPERCONDUCTIVE MATERIAL PRECURSOR, RE-BARIUM-COPPER-OXYGEN-BASED SUPERCONDUCTIVE MATERIAL AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a large sized superconductive material having Ag added with a simple method by devising the structure of a precursor.;SOLUTION: The superconductive material precursor is constituted so as to include a structure formed by laminating an A layer in which 5-40 mass% Ag or an Ag compound expressed in terms of Ag is incorporated in a RE-Ba-Cu-O (RE is Y and a rare earth element)-based mixture and a B layer in which ≤5 mass% Ag and/or an Ag compound expressed in terms of Ag is incorporated. The method of manufacturing the RE-Ba-Cu-O based superconductive material is performed by placing or burying a seed crystal on the surface of the B layer of the precursor, heating the precursor to a temperature equal to or below a decomposition and melting temperature of the seed crystal to make the precursor semi-melted and cooling to crystal-grow a REBa₂Cu₃O_y superconductive phase using the seed crystal as a base point.;COPYRIGHT: (C)2004,JPO