High-Tc oxide superconductor and method for producing the same
AssigneeKabushiki Kaisha Toshiba
InventorsYutaka Yamada, Satoru Murase
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Abstract
A high-Tc oxide superconductor including Bi, Sr, Ca, Cu, O and at least one of Pb and Al, with a high critical temperature than that of liquid nitrogen. A method for producing the high-Tx oxide superconductor is also disclosed, in which Bi.sub.2 O.sub.3, SrCO.sub.3, CaCO.sub.3, CuO and PbO or Al.sub.2 O.sub.3 powders are mixed, calcined, ground, cold-pressed and sintered. The calcined mixture may be melted and annealed to obtain a tape-form superconductor.
Claims6
The cuprate oxide superconductor having a nominal composition (Bi.sub.1-x X.sub.x).sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.c O.sub.10+.delta. wherein X is at least one of Al and Pb, in a stoichiometric ratio in which x=0.05 to 0.85, c=1.5 to 4.5 and .delta. is 0 to 1.
Dependencies are inferred from the claim text.