Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1989-08-02
1991-03-19
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
252521, 423111, 505737, 505738, 505783, C01F 1102, C01G 302, H01L 3912
Patent
active
050011073
ABSTRACT:
This invention provides improved methods for the preparation of precursor powders that are used in the preparation of superconducting ceramic materials that contain thallium. A first solution that contains the hydrogen peroxide and metal cations, other than thallium, that will be part of the ceramic is quickly mixed with a second solution that contains precipitating anions and thallium (I) to form a precipitate which is dried to yield precursor powders. The precursor powders are calcined an sintered to produce superconducting materials that contain thallium.
REFERENCES:
patent: 4192814 (1980-03-01), Johnson
patent: 4418051 (1983-11-01), Brown et al.
patent: 4438080 (1984-03-01), McEuen et al.
patent: 4438089 (1984-03-01), Byers
Grant & Hackh's Chemical Dictionary, 5th Ed., 1987: McGraw-Hill Book Co., pp. 583-584.
Beyers, "Crystallography and Microstructure of Tl--Ca-Ba--Cu--O", Appl. Phys. Lett., vol. 53(5), Aug. 1, 1988, pp. 432-434.
Haldar, "Bulk Superconductivity at 122K in Tl(Ba,Ca).sub.2 Ca.sub.3 Cu.sub.4 O.sub.10.5+.delta. ", Science, vol. 241, 1988, pp. 1198-2000.
Pramanik, "Preparation of Superconducting Ceramic Oxides . . . ", Rev. of Sol. State Sci.: Proceedings, May 2-4, 1988, pp. 57-59.
Fujki, "Preparation of a High-T.sub.c Y--Ba--Cu--O Superconductor . . . ", Jap. Jnl. Appl. Phys., vol. 26(7), Jun. 1987, pp. L1159-L1160.
Ihara, "A New High-T.sub.c TlBa.sub.2 Ca.sub.3 Cu.sub.4 O.sub.11 Superconductor . . . ", Nature, vol. 334, Aug. 11, 1988, pp. 510-511.
Torardi, "Crystal Structure of Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.10, a 125K . . . ", Science, vol. 246, Apr. 29, 1988, pp. 631-633.
Sugise, "Preparation of Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.y Thick Films . . . ", Jap. Jnl. Appl. Phys., vol. 27(12), Dec. 1988, pp. L2314-L2316.
Parkin, "Tl.sub.1 Ca.sub.n-1 Ba.sub.2 Cu.sub.n O.sub.2n+3 (n=1, 2, 3): A New Class . . . ", Phys. Rev. Lett., vol. 61(6), Aug. 8, 1988, pp. 750-753.
Bunker Bruce C.
Lamppa Diana L.
Voigt James A.
Boyd John
Chafin James H.
Lieberman Paul
McMillan Armand
Moser William R.
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