MANUFACTURING METHOD OF TAPE-SHAPED Re-BASE (123) SUPERCONDUCTOR

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This invention provides a production process of a tape-shaped superconductor which can realize high Jc and Ic values by virtue of the elimination of the cause of generation of cracks and deterioration of an electrical connectivity in crystal grain boundaries. In producing an Re-base (123) superconductor on a substrate by an MOD process, the use of a raw material solution having a Re : Ba : Cu molar ratio of 1 : X : 3, wherein X is a Ba molar ratio satisfying X < 2 (preferably 1.0 ≦ X ≦ 1.8, especially 1.3 ≦ X ≦ 1.7), can realize the production of a thick-film tape-shaped superconductor having a superconductivity of Jc = 3.20 MA/cm2 and Ic = 525 A/cm (X = 1.5).