| 摘要 |
PURPOSE:To produce an oxide superconducting circuit of a uniform and dense structure by a method wherein a coil-pattern-shaped circuit layer containing Ba1Cu1O2 and CuO is formed on a substrate having a composition of Y2Ba1Cu1O5 and it is heat-treated in an atmosphere of oxygen. CONSTITUTION:A spiral-shaped groove 2 is formed in a substrate 1; a BaCuO2 powder and a CuO powder are mixed in a ratio of 1:1; a mixed powder which has been baked temporarily is filled; a filled layer 4 is formed. Then, when the substrate 1 is heated in an atmosphere of oxygen at 980 to 1020 deg.C for several hours to several tens of hours, one part of the filled layer 4 is melted and becomes liquid; a solid-liquid reaction progresses between a molten substance of the filled layer 4 and the substrate 1 in its circumference; after a cooling operation, a superconducting circuit 6 composed of an oxide superconductor with a composition of Y1BaCu3O7-delta is produced in nearly the whole inside the groove 2; a superconducting sheet coil S can be obtained. In addition, oxygen is diffused; constituent elements of the substrate 1 are diffused sufficiently by the solid-liquid reaction and are reached. Thereby, it is possible to produce the superconducting circuit 6 of the oxide of a voidless and dense structure. |
