| 摘要 |
PURPOSE:To raise the critical temp. (Tc) and the temp. (Tcf) at which the electric resistance becomes completely zero, by embodying the condition in which oxides having crystal structure of pseudo-perovskite type, which bears superconduction, is produced. CONSTITUTION:Oxide as superconductor after preliminary baking, crushing, and molding is inserted in a metal pipe, in which another metal pipe with small wall thickness consisting of at least one of such metals as elements of Ag, Au, platinum type and stainless steel is fitted, and the ends of the pipes are sealed followed by extrusion treatment and heating for sintering of the oxide in the metal pipe, and thus a superconductive wire is obtained. The molded oxide to be inserted in the metal pipe shall preferably be pulverized nitride, oxide, hydroxide, carbonate, sulfate, oxalate, or nitrate of elements of group IIa, elements of group IIIa, and elements of either group Ib, IIb, IIIb, or VIIIa, which is baked and molded. This provides high Tc as well as high Tcf. |
