초록 ▼

An oxide superconductor current lead provided with a rod-like or pipe-like oxide superconductor, at each of end parts of which a metallic electrode is formed. In this oxide superconductor current lead, the oxide superconductor is a Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.X superconductor. Further,

An oxide superconductor current lead provided with a rod-like or pipe-like oxide superconductor, at each of end parts of which a metallic electrode is formed. In this oxide superconductor current lead, the oxide superconductor is a Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.X superconductor. Further, the metallic-electrode-portion contact resistivity thereof is not more than 0.05 .mu..OMEGA..multidot.cm.sup.2. Moreover, the critical current density is not less than 2,000 A/cm.sup.2. Furthermore, there is provided a method of manufacturing such an oxide superconductor current lead. To perform this method, optimum conditions for conducting a heat treatment when forming electrodes at both ends of an oxide superconductor current lead are detected. Thereby, the contact resistivity during a superconducting coil becomes extremely small. Further, the critical current density is considerably enhanced. In the case of this method, an oxide superconductor (8) obtained by finishing a final sintering process is first worked into or shaped like a rod or a pipe. Then, metallic electrode portions (9) are formed by winding metallic foil around end parts of the superconductor, or by applying metallic paste thereto, or by performing a physical vapor phase epitaxy process such as a sputtering process or an evaporation process. Subsequently, a heat treatment is performed on the metallic electrode portions at a temperature, which is in a 810 to 830.degree. C. range, for a time period of 2 to 20 hours. Thus, an oxide superconductor current lead is obtained.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of manufacturing an oxide superconductor current lead, comprising:a step of working a Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.X system oxide superconductor, which is obtained by a process of manufacturing an oxide superconductor, into a rod-like or pipe-like

[ What is claimed is:] [1.]1. A method of manufacturing an oxide superconductor current lead, comprising:a step of working a Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.X system oxide superconductor, which is obtained by a process of manufacturing an oxide superconductor, into a rod-like or pipe-like oxide superconductor;a step of forming metallic electrode portions at both end parts of said oxide superconductor, respectively; anda step of performing a heat treatment on said metallic electrode portions thereof at a temperature in a range of 810 to 830.degree. C. to thereby obtain a current lead.