| 摘要 |
PURPOSE:To obtain the title thick film with higher critical current density, capable of forming into products in a variety of shapes easily and stably, by spraying on a substrate a solution in which the metallic elements constituting the corresponding superconductor have been homogeneously dispersed, followed by heat treatment. CONSTITUTION:A starting material made up of at least one kind of compound selected from oxides, hydroxides, nitrates and carboxylates, formulated so as to form the objective oxide superconductor by heat treatment is dissolved in an acid followed by dilution with water or water-alcohol to prepare an aqueous solution or aqueous alcohol solution. Thence, this solution is sprayed on a substrate to effect adherence of said starting material to the substrate to form a compound film followed by heat treatment of said film. Preferably, the heat treatment temperature is 750-1,000 deg.C. Said oxide superconductor is, e.g., Y-Ba-Cu- O, Bi-(Se, Ca)-Cu-O-based one. |
