Process for producing a compound oxide type superconducting mate

Details Process for producing a compound oxide type superconducting mate Process for producing a compound oxide type superconducting mate

1988-05-18

1990-02-13

Morgenstern, Norman

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

427 39, 427 62, 423593, 204164, 505742, B05D 512, B05D 306

Patent

active

049007165

ABSTRACT:
The invention is an after-treatment of a compound oxide type superconducting material by oxygen plasma to improve the superconducting property of the material. The treatment by oxygen plasma is performed while the material is heated at 500.degree. to 1,000.degree. C.
The material may have a form of bulky mass or a form of a thin film deposited on a substrate by physical vapor deposition technique.

REFERENCES:
patent: 3932315 (1976-01-01), Sleight
Magazine Article from Z. Phys. B, dated Apr. 1986, Titled, "Possible High T.sub.c Superconductivity in the Ba--La--Cu--O System", by J. G. Bednorz and K. A. Muller, pp. 189-193.
Landesman et al., "Magnetic and XPS Studies of YBa.sub.2 Cu.sub.3 O.sub.7-8 Annealed in O.sub.2 Plasma", AIP No. 165, Nov. 1987, pp. 389-396.
Tamura et al., "Effects of a Plasma Oxidation of YBa.sub.2 Cu.sub.3 O.sub.7-y Films", Extended Abstracts of ISEC, Aug. 1987, Japan P414.
Maeda et al., "A New High-Tc Oxide Superconductor Without a Rare Earth Element", Jpn. J. Appl. Phys., vol. 27(2), Feb. 1988, L209-210.
Sheng et al., "Superconductivity at 90k in the Tl--Ba--Cu--O System", Phys. Rev. Lett., vol. 60(10), Mar. 1988, pp. 937-940.

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