Effects of Sintering on the Microstructure and Critical Current Density of Ag-sheathed BiPbSrCaCuO Superconducting Tapes

Junhua LIU+, Dept. of Manufacturing Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, ChinaZutang WANG, Dept. of Mechanical Engineering, Tsinghua University, Beijing, 100084, China

摘 要：<正> The effects of sintering on the microstructure and the critical current density of Ag-sheathedBiPbSrCaCuO （2223） superconducting tapes prepared by the powder-in-tube technique were in-vestigated. The microstructure of oxide layer and the J_C at 77 K were strongly dependent on thesintering condition. The optimum sintering temperature, time and cooling rate to maximize J_C valueswere in the range about 840-850℃, 100-200 h and 50-100℃/h, respectively.

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