| 摘要 |
PURPOSE:To enable production of a uniform and dense superconductor consecutive in a layer state, control of thickness of superconductive layer and formation of composition having uniform direction of crystal in production of superconducting material by diffusion reaction, by heat-treating a composite material consisting of a first element containing Ag and a second element. CONSTITUTION:A composite material of a first element comprising the whole or part of components constituting a superconductor and Ag and a second element comprising the whole or part of the components constituting the superconductor is prepared. The composite material is heat-treated to form a superconductor at the interface between both the elements by diffusion reaction. For example, powdery Y2O3, BaCO3 and CuO are blended in a composition of 2:1:1 calcined, molded and burnt to form a second element. Separately, powdery BaCO3 and CuO are blended so as to form a ratio of 0.3:5, calcined, burnt, ground, mixed with a given amount of Ag powder and mixed to give a first element. The first element is suspended in PVA to give a slurry, which is applied to the second element to give a composite material. The composite material is heat-treated to give a Y-Ba-Cu-O-based oxide superconductor. |
