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Fabrication and Microstructure of BSCCO Superconductive Wires Made by LHPG Method

【摘要】:正 Laser heated pedestal growth technique (LHPG) has been used to fabricate BSCCO (BiSrCaCuO)superconductive wires.The critical current density of the wires has surpassed 5000A/cm~2 (78K,OT;cross area=1.04 mm~2).The fiber rods obtained directly from LHPG method are semiconductiveand after heat treatment at temperature range from 780 to 870℃,they transformed intosuperconductive wires.Triple junctions and sharp grain boundary exist in the sample.HREM studiesshowed the intergrowth of (010) and (110),the occasional missing of CaCuO_2 layer in the 2212phase.

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