| 摘要 |
PURPOSE:To stabilize quality of superconductor by providing a coating layer containing Bi and Pb to the opening end of vessel body housing a superconducting material containing Bi and Pb combined with O2, putting a lid thereon and burning the coating layer. CONSTITUTION:A superconducting material obtained by blending powders of Bi, Pb, Sr, Ca and Cu each combined with O2 is blended with a binder and the blend is subjected to compression molding to afford a molded article 1. Then the molded article 1 is housed through a spacer and placing sand having the same composition as the molded article 1 into a vessel body consisting of a material (e.g. alumina ceramic) remarkably unreactive with Bi and Pb and having an opening part. A paste containing Bi and Pb is applied to opening end face part of the vessel body 2 and the paste is dried to form the coating layer 4 and then the lid 3 is fitted thereon and the vessel is charged into a burning furnace to burn the superconducting material. |
