| 摘要 |
The present invention provides single-phase, homogenous superconducting materials with critical temperatures of superconducting transition higher than about 133 DEG K and having a composition represented by the general formula: (AgaAubPtcPbdBie) (Ba2-fSrf)Can-1CunO2n+1+x, where a + b + c + d is between about 0.75 and about 2.0 inclusive, a + b + c is a number greater than 0, f is a number between about 0 and about 2 inclusive; n is an integer between 1 and about 10 inclusive, and x is a number greater than 0. The following are preferred compositions of the present invention: Pt1Ba2Ca2Cu3O9, (Ag0.5Au0.5)Ba2Ca2Cu3O9, (Ag0.75Pb0.25)Ba2Ca2Cu3O9, (Ag0.75Bi0.25)Ba2Ca2Cu3O9, (Ag0.75Pb0.125Bi0.125)Ba2Ca2Cu3O9.
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