JOINED PRODUCT OF OF SUPERCONDUCTIVE OXIDE MATERIALS AND ITS MANUFACTURE

摘要

A bonded element of superconductive oxide materials having a high current density and a method for manufacturing such an element. The bonded element is such that regularly oriented superconductive oxide materials are bonded through the same kind of superconductive phase having the same crystalline orientation as, but a peritectic temperature lower than that of the bonding materials. The bonding method is such that the crystalline orientations of the bonding superconductive oxide materials are adjusted on the bonding surface; a substance which is formed by the constituent elements of the superconductive oxide material having a peritectic temperature lower than that of the material is inserted as the solder or is caused to contact each of the bonding superconductive oxide materials on the bonding surface; these materials are heated at a temperature lower than the peritectic temperature of the bonding materials, but higher than the peritectic temperature of the solder; and these are gradually cooled so that the same kind of oxide superconductor is grown and oriented on the bonded surface. In this way, it is possible to obtain a bonded element of the superconductive oxide materials having a high critical current density without grain boundaries that may hinder the flow of the electric current. The element can be used as a material for magnets, magnetic shields, and current leads. <IMAGE>