Superconductive compounds and process for producing said compoun

Details Superconductive compounds and process for producing said compoun Superconductive compounds and process for producing said compoun

1995-02-22

1996-12-10

Bonner, Melissa

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Shaping or consolidating

505125, 505500, 505739, 423593, 264 65, 501123, C04B 3545

Patent

active

055830960

ABSTRACT:
A process of manufacturing a superconducting compound including mixing stoichiometric amounts of a metallic oxide, copper oxide and a metallic carbonate wherein the metal of the metallic oxide is one other than yttrium and is selected and identified by its intrinsic massivity which is close in value to the intrinsic massivity of yttrium and wherein the interplanar distance on the C axis between Cu--O planes that exchange electrons through the electron-hopping mechanism in the ceramic perovskite is within the range of 1.97 .ANG. and 1.01 .ANG.. The mixture is subjected to pressure to form pellets and the pellets are then heated in forming the compound. The compound produced by the process and ceramic compositions having the formulas Mn Sr.sub.2 Cu.sub.3 O.sub.7-x and Mn.sub.2 Sr.sub.2 Cu.sub.3 O.sub.7-x.

REFERENCES:
patent: 4843059 (1989-07-01), Deslandes et al.
patent: 5004725 (1991-04-01), Ovshinsky et al.
Beno et al, "Structure of the single phase high-temperature superconducting YBa.sub.2 Cu.sub.3 O.sub.7-.delta.", Appl Phys Lett, vol. 51, No. 1, 6 Jul. 1987, pp. 57-59 Ceramic Processing, NAGS, 1968 pp. 24-25.
Hien et al, "Infuence of the Fe and Mn Substitution on the Crytal Structure and Superconducting Proprties of 1:2:3 Compounds", Phy. Stat. Sol. (a), 131, 6/92, K47-K51.

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