| 摘要 |
PURPOSE:To inhibit formation of cracks by interposing oxide or carbonate powder other than Cu in constituent metallic elements of an oxide superconductor as a mold release agent between a carbon mold and raw material powder. CONSTITUTION:Y2O3 powder, BaCO3 powder and CuO powder are mixed at a prescribed molar ratio and the resultant mixture is calcined and then pulverized to prepare an RE-Ba-Cu-O-based oxide superconductor powder (RE is rare earth element) such as YBa2Cu3O7-delta. On the other hand, oxide or carbonate powder of an element such as Y2O3 powder other than Cu is kneaded with an aqueous solution of an acrylic acid ester copolymer, etc., to produce a slurry, which is subsequently applied to the contact surface of a carbon mold with a sample to a prescribed thickness and dried. The prepared oxide superconductor powder is then filled in the carbon mold, pressurized and heated to afford a target material for forming an oxide superconducting thin film without fixing to the carbon mold and forming cracks. |
