METAL ADDED CERAMIC SUPERCONDUCTOR AND ITS MANUFACTURE

摘要

PURPOSE:To increase a critical current of a polycrystal ceramic superconducting material by filling the gaps among the particles of the ceramic superconducting material with a metallic substance by mixing the metallic substance and granular ceramic superconducting material. CONSTITUTION:To a powdered bulk superconductor, for example, solution of a silver compound is added; proper binder is mixed to it and the admixture is applied on a substrate; it is heated to remove the binder and the silver compound is decomposed. And then the substrate is heated to sinter the superconducting granular substance (being wet with silver) and it is annealed in an atmosphere of oxygen gas so that oxygen content of the superconductor can be optimized. The bonding character among the particles of the superconducting substance is thereby improved and the critical current of the superconducting bulk material is increased.