| 摘要 |
PURPOSE:To form a superconductive intermetallic compound uniformly in the whole region of a disk, and to manufacture the superconducting disk displaying stable superconductive characteristics by covering a substrate with a thin member containing Sn and executing heat treatment through which a laminated plate is heated at a specific temperature. CONSTITUTION:A first substrate 11 in a laminated plate 14 with the first substrate 11 containing Cu and a second substrate 12 including Nb is covered with a thin member 15 containing Sn, and first heat treatment through which the laminated plate 14 is heated at a temperature higher than the melting point of Sn and lower than 300 deg.C is executed. Second heat treatment through which the laminated plate 14 is heated at a temperature higher than the first heat treatment temperature and lower than a diffusion heat treatment temperature is carried out, and diffusion heat treatment for forming Nb3Sn is executed, thus manufacturing a superconductive disk 20. The thin member 15 such as one consisting of Sn is stuck onto the surface of the laminated plate 14 in which the first substrate 11 such as one composed of Cu, the second sub strate 12 such as one made up of Sn and a stabilized substrate such as one 13 consisting of Cu are laminated. The upper surface of the member 15 is covered with a ceramic board 16 and first heat treatment is carried out, and an intermediate layer 11a composed of Cu and Sn is formed.
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