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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