OXIDE SUPERCONDUCTOR AND PRODUCTION THEREOF

摘要

PURPOSE:To provide the subject superconductor having a high critical temperature and comprising the polycrystal of a specific peritectic by molding the mixed powders of RE2BaCuO5 (RE is rare earth element), BaCuO2 and CuO or a pre-calcined powder thereof and subsequently calcining the molded product. CONSTITUTION:The mixed powders of RE2BaCuO5 (RE is rare earth element), BaCuO2 and CuO preferably in a molar ration of 1:3(1-x):2(1-x) (x>=0.01) or the pre-calcined product thereof is molded and subsequently calcined preferably in an oxidizable atmosphere of 900-1100 deg.C to provide the subject superconductor comprising the polycrystal of a peritectic containing preferably 0.5-8mol% of the paramagnet 1 of a RE2BaCuO5 composition substantially in REBa2Cu3O7-delta oxide superconducting crystalline granules 2 and having a critical temperature of >=80Kc.