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AssigneesCentral Research Institute of Electric Power Industry, Dowa Electronics Materials Co., Ltd.
InventorsMasahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
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The present invention provides a Bi2223 based thick film that does not peel off when a thermal or a mechanical shock is applied to a base or an oxide superconductor thick film or the like in the middle of a manufacturing process and a method of manufacturing the same. An oxide superconductor paste 1 having a mixing ratio of Bi2212 composition is applied to a base 3, dried, burned, and thereafter burned at a temperature approximate to its melting point to obtain a partially molten layer 4. Next, an oxide superconductor paste 2 having a mixing ratio of Bi2223 composition is applied to the partially molten layer 4, dried, burned, compressed by a CIP, and thereafter repeatedly burned and compressed for a predetermined number of times to obtain the base 3 having a desired superconductor thick film 5 formed thereon.
A method for manufacturing an oxide superconductor thick film in such a manner that an oxide superconductor thick film containing Bi, Pb, Sr, Ca and Cu is formed on a surface of a substrate or a base, comprising, burning a first thick film substantially having a composition of Bi2Sr2Ca1Cu2Oz on the surface of said substrate or said base in an atmosphere at 880° C. to 885° C., and thereafter, forming an oxide superconductor thick film substantially having a composition of (Bi, Pb)2+aSr2Ca2Cu3Oz (Note:
A method for manufacturing an oxide superconductor thick film in such a manner that an oxide superconductor thick film containing Bi, Pb, Sr, Ca and Cu is formed on a surface of a substrate or a base, comprising, burning a first thick film formed from powders of Bi2O3, SrCO3, CaCO3 and CuO weighed to have a mole ratio of Bi2212 on the surface of the substrate or the base in an atmosphere at 880° C. to 885° C., and thereafter, forming an oxide superconductor thick film from powders of Bi2O3, PbO, SrCO3, CaCO3 and CuO on the first thick film.
Dependencies are inferred from the claim text.