Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber
Patent
1990-09-27
1999-08-03
Derrington, James
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Process of making wire, tape, cable, coil, or fiber
505725, 505739, 505740, 505815, 505822, 505490, 264434, C04B 3564
Patent
active
059325240
ABSTRACT:
A high Tc superconducting ceramic material is produced by a method in which a mixture of chemicals in suitable amounts is compacted into a desired form. The compacted mixture is then fired and, at the same time, an electric current is caused to pass through the compacted mixture in a predetermined direction. By virtue of the passage of the current through the material during firing, the orderliness of the molecular arrangement is enhanced and an elevated transition temperature Tc is obtained.
REFERENCES:
patent: 4939121 (1990-07-01), Rybka
patent: 4975412 (1990-12-01), Okzzaki et al.
Sorimachi et al, Japanese Journal of Applied Science vol. 26, No. 9, Sep. 1987 <1451-<1452.
Djurek et al, "Sintering of a Mixed Phase YBa CuO in a Pulsed Electric Field"; Europhys Lett. (4)(10), pp. 1195-1198 Nov. 1987.
Zeitschrift fur Physik B--Condensed Matter, vol. 66, No. 3, Mar. 10, 1987, pp. 141-146, Springer-Verlag; C. Politis et al.: "Superconductivity at 40 K in Lal.8Sr0.2Cu04", *pp. 141-143, II experimental procedures*.
Materials ResearchBulletin, vol. 20, No. 6, 1985, pp. 667-671, Pregamon Press Ltd., C. Michel et al.: "The oxygen defect perovskite BaLa4Cu5013.4, A Metallic Conductor", *pp. 667-668, paragraph 3.
Zeitshcrift fur Physik B--Condensed Matter, vol. 64, 1986, Springer-Verlag; J.G. Bednorz et al.: "Possible High T.sub.c Superconductivity in the Ba-La-Cu-O System".
Costellia Jeffrey L.
Derrington James
Ferguson Jr. Gerald J.
Semiconductor Energy Laboratory Co,. Ltd.
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