| 摘要 |
PURPOSE:To reduce a quantity of Ag for use, eliminate the necessity of special care in handling a cable and simplify the maintenance inspection of the cable after laid by covering a silver covered superconducting wire with a complex tube. CONSTITUTION:A superconducting wire comprising a superconducting ceramic 3 having a perovskite structure compound composed of rare earth elements containing Y, alkaline earth metals, copper and oxygen, and Ag 4 is covered with a complex tube comprising an Ag portion 2 and a metal portion 1 other than Ag, and so constituted that the Ag portion 2 exists ranging over inner to outer surfaces. A superconducting complex cable is thereby obtained. As a result, it is possible to prevent the swell of the complex tube due to oxygen discharged from the ceramic 3. Also, the application of heat treatment in the atmosphere or oxygen atmosphere makes it possible to diffuse oxygen for penetration from the outside, thereby supplying oxygen to the ceramic 3. |
