PRODUCTION OF SINTERED BODY OF PEROVSKITE TYPE COPPER-CONTAINING OXIDE SUPERCONDUCTOR

PURPOSE:To obtain a sintered body of a perovskite type oxide superconductor having a satisfactorily high critical temp. by sintering a mixture of CuO powder whose principal CuO particles have a prescribed specific surface area with other starting materials. CONSTITUTION:When CuO powder is mixed with other starting materials and this mixture is sintered to produce a sintered body of a perovskite type Cu- contg. oxide superconductor, the CuO powder is so regulated that the principal CuO particles have 30-100m /g specific surface area. A uniform reaction is performed at the time of sintering and no unreacted material is left. The resulting sintered body has a nearly single high-temp. phase structure and a higher critical temp. than the conventional sintered body. The oxide superconductor may be TlBaCaCuO (Tl-contg. oxide).