Sodium-intervened superconductor and its manufacturing method

Details Sodium-intervened superconductor and its manufacturing method Sodium-intervened superconductor and its manufacturing method

1998-12-29

2000-01-04

Kopec, Mark

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

505500, 505742, 505780, H01L 3912, H01B 1200, C04B 35505, C04B 3564

Patent

active

060109823

ABSTRACT:
The present invention relates to a sodium-intervened superconductor and its manufacturing method and more particularly, to the sodium-intervened superconductor expressed by the following Formula 1 and its manufacturing method, wherein the superconductor, prepared from a stoichiometric mixture of Y.sub.2 O.sub.3, NaCuO.sub.2, BaCuO.sub.2, Ln.sub.2 O.sub.3 (Ln: lanthanide ion) and CuO under the atmosphere of oxygen, has some advantages in that a) through the use of NaCuO.sub.2, a ternary oxide, as a reactant, the formation of impurities and sodium evaporation may be prevent, and b) through partial substitution of a divalent barium by a trivalent lanthanide group ion, the superconductor is stable in air with a higher critical current density and critical temperature.
Formula 1

REFERENCES:
Matsumoto et al. "Superconducting Y.sub.1-x L.sub.x Ba.sub.2-y M.sub.y Cu.sub.3-z N.sub.z O.sub..delta. . . . "Materials Research Bulletin, vol. 23, No. 8, 1988.

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