Method of producing an oxide superconductor without sheath...

Details Method of producing an oxide superconductor without sheath... Method of producing an oxide superconductor without sheath...

H - Electricity

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H01L 39/12 (2006.01) C04B 35/45 (2006.01) H01L 39/14 (2006.01) H01L 39/24 (2006.01)

Patent

CA 1313032

52 Abstract of the Disclosure A method of producing a superconductor including a superconductive oxide. The superconductive oxide is represented by the formula AxByCzD7-.delta. provided that the A is at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, the B is at least one selected from the group consisting of Be, Sr, Mg, Ca, Ba and Ra, the C includes Cu, the D includes 0, about 0.1 < x < about 2.0, about 1 < y < about 3, about 1 < z < about 3, 0 < .delta. < 5, or by the formula AxByCazCuiOj provided that the A includes Bi or Tl, the B includes Sr or Ba, about 1 < x < about 3, about 1 < y < about 3, about 0 < z S about 3 and about O-< i-~ about 9. A filling material is charged into a metallic pipe for forming a preform. The filling material is at least material selected from the group consisting of a starting material powder of the superconductor, a powder of the superconductor and a compact made of the starting material powder and/or the superconductive powder. The preform is reduced in cross- sectional area for orming a composite including a core, made of the at least one filling material, and a metallic sheath covering the core. The metallic sheath of the composite is removed for exposing the core. The exposed core is heat treated for producing the superconductive oxide.

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