MANUFACTURE OF OXIDE SUPERCONDUCTOR WIRE

摘要

PURPOSE:To improve the superconductive characteristic by making a precursor of an oxide-based superconductor by press-forming and sintering two materials of specific compositional ratios mixed together, inserting the precursor into a metallic pipe to form a complex body, reducing the diameter of the complex body to make a wire and heat-treating the wire. CONSTITUTION:A material of the compositional ratio of A2B1Cu1O5 and a material of the compositional ratio of B3Cu5Oy (where y=5-15) are mixed together with the mol mixing ratio of 1:1. The mixture is press-formed to make a press-formed body. The press-formed body is sintered to make a precursor of an oxide-based superconductor. The precursor is inserted into a metallic pipe to form a composite body. The composite body is made into a wire by a diameter reducing process and heat treated. (The element A is of the group IIIa and the element B is of the group IIa). This makes it possible to obtain a superconductor wire of an excellent superconductive characteristic such as the critical current density with a high efficiency.