R-Tl-Sr-Ca-Cu-O superconductors

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k


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252521, 423604, 423624, 423635, 501123, 502346, 505783, C01F 1102, C01F 1700, C01G 302, C01G 1500




A high temperature superconductor system is provided having the following formula: M-A-B-C-D-E, wherein, M is a metallic element, A is an element in Group 3A, B is an element in Group 2A, C is another element in Group 2A, D is an element in Group 1B, and E is an element in Group 6A. In an embodiment, the high temperature superconductor has the following formula: R-Tl-Sr-Ca-Cu-O (wherein R is chosen from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y). Processes for making these high temperature superconductors are also disclosed.

patent: 4880773 (1989-11-01), Itozaki et al.
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Ihara "Possibility of Superconductivity at 65.degree. C. in Sr-Ba+Y-Cu-O" Jap. Jnl. of Appld. Phys. vol. 26, No. 8 Aug. 1987, pp. L1413-L1415.
Bhattacharya "High-Temp. Superconducting Properties in Y.sub.1-x A.sub.x Ba.sub.2 Cu.sub.3 O.sub.7-x . . . " Physica C 152 Jun. 1, 1988, pp. 283-285.
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