Production of superconductive material

Abstract

Abstract PURPOSE:To easily and inexpensively obtain an oxide superconductive material of a single crystal having a high critical temp. and large critical current density by melting the oxide superconductive material and forming the single crystal material from the material in a molten state while impressing magnetic fields thereto from the outside. CONSTITUTION:The oxide superconductive material is prepd. by mixing fine powders of the oxides or carbonates, etc., of group IIIa elements and group IIa elements of the Periodic Table and copper, then calcining and pulverizing the mixture. This oxide superconductive material is supplied through an introducing port 34 into a crucible 22 and is heated and melted by a heater 29. The magnetic fields are impressed from magnets 25, 26, 27, 28 to the material 24 in the molten state and the material in the molten state is magnetically rotated and stirred, by which the material is maintained in the homogeneous state. The superconductive material 23 of the single crystal is pulled up in the form of a band from the oxide superconductive material 24 in the molten state, by which the oxide superconductive material 23 of the single crystal is obtd.

Inventors

• 👤 Shunpei Yamazaki

Bibliographic Details