| 摘要 |
PURPOSE:To prevent breakdown or the like of a superconductive current lead used in a superconductive magnet apparatus. CONSTITUTION:A silver electrode 31 is respectively formed at both end portions of a ceramic current lead bulk 30 and these silver electrodes 31 are respectively provided with copper electrodes 32. Except for a part of this copper electrode, the current lead bulk 30 is molded with a resin mold layer 33 together with electrodes. Ceramic powder is added as required to the resin mold layer and its thermal expansion coefficient is set almost equal to that of the current lead bulk. Since the resin mold layer is provided as described, strength against stress increases and moreover since the thermal conduction coefficients of resin mold layer and current lead bulk are almost equal, thermal stress is little generated. |
