发明授权
US6043198A High-T.sub.c superconductor or precursor material for the oxide-powder-in-tube method (OPIT) 失效
用于氧化物管内法的高Tc超导体或前体材料(OPIT)

High-T.sub.c superconductor or precursor material for the
oxide-powder-in-tube method (OPIT)
摘要:
The present invention relates to a process for preparing a high-T.sub.c superconductor as a precursor material for the oxide-powder-in-tube method, which involves mixing the oxides of the elements Bi, Sr, Ca and Cu and completely melting them at temperatures of .gtoreq.1000.degree. C., then casting the melt onto a substrate which is kept at room temperature, and disintegrating the cooled melt block and grinding it into a powder.
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