MANUFACTURE OF OXIDE SUPERCONDUCTOR WIRE

摘要

PURPOSE:To prevent defects such as cracks from being produced by mixing two oxides of specific compositional ratios together with the mol mixing ratio of 1:X (X>=1) followed by a direct heat treatment in an oxygen atmosphere. CONSTITUTION:A first material oxide of the compositional ratio of A2B1Cu1O5 and a second material oxide of the compositional ratio of B3Cu5Oy are mixed together with the mol mixing ratio of 1:X (X>=1). After press-forming the mixed oxide 5 around a metallic core body 4, the product is packed into a metallic pipe and processed by wire drawing process to make a wire material 1. The wire material is then removed of a metallic layer 3 to expose the wire body 2 and heated in the atmosphere at temperature of 800-950 deg.C for a period of 6-50 hours. As a result, the first material powder and the second material powder diffusion-react at their contacting portion to become a superconductor layer 6. The product is gradually cooled to obtain a superconductor wire 7. (The element A is in the group IIIa and the element B is in the group IIa.) This makes it possible to prevent defects such as cracks from being produced and to manufacture a superconductor wire having an excellent superconductive characteristic.