Fabrication and Microstructure of BSCCO Superconductive Wires Made by LHPG Method

Cheng ZHANG Xin WANG Ming JIANG Jianguo HUANG Yongzhong WANG Guiwen QIAO Institute of Metal Research,Academia Sinica,Shenyang,110015,China

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/cm² （78K,OT;cross area=1.04 mm²）.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 CaCuO₂ layer in the 2212phase.

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