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Fabrication Technology of High Tc Superconductor by Organic Salts Method

High Tc superconducting with a BiSrCaCuO was prepared by the citrate method. The solid precursor produced by the dehydration of the gel at $120^{\circ}C$ for 12h is not in the a morphous state as expected but in a crystalline state. X -ray diffraction peaks of nearly the same angular position as the peaks of high Tc phase were observed in the precursor.