Methods for processing superconducting materials

Details Methods for processing superconducting materials Methods for processing superconducting materials

1988-12-05

1992-11-24

Lewis, Michael

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505742, 423263, 423593, 204176, H01L 3912, C01B 1310, C01F 1700

Patent

active

051661314

ABSTRACT:
A superconducting oxide is exposed to ozone. In one embodiment, the oxide is cooled to the superconducting state before exposure to ozone. The oxide may also be thermally cycled into and out of the superconducting state before exposure to ozone. The ozone may be in either the liquid or gaseous state and may be mixed with molecular oxygen. After exposure to ozone, the critical, or transition, temperature is elevated in comparison with material not so processed.

REFERENCES:
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"Improved High-T.sub.c Superconductors", Bhargava et al., Phys. Rev. Lett., Sep. 28, 1987, pp. 1468-1471, vol. 59, No. 13.
"Effects of Surface Treatments on Ba.sub.2 YCu.sub.3 O.sub.7-y Thin Films", Tamara et al., Mat. Res. Soc. Symp. Sup., Apr., 1988, pp. 117-120.
"Thermal Stability of Superconducting YBa.sub.2 Cu.sub.3 O.sub.9-x in Different Environments", Swaminathan et al., Materials Letters, May, 1988, pp. 261-264, vol. 6, No. 8-9.
"Growth of YBa.sub.2 Cu.sub.3 O.sub.x single crystals", Kaiser et al., Appl. Phys. Lett. (51) No. 13, Sep. 28, 1987, pp. 1040-1042.
"Synthesis of Y-Ba-Cu-O Superconductors from Y.sub.2 O.sub.3 BaO.sub.2, and Cu.sub.2 O: The Optional Oxygen Treatment", Kao, Mat. Lett., vol. 6, No. 3, Dec., 1987, pp. 53-57.
"Atmospheric Effects During Thermal Cycling of Ba.sub.2 YCu.sub.3 O.sub.7.+-.x Superconductors", North-Holland Physics Pub., Jul., 1987, Shelby et al., pp. 420-424.
"Production of Superconducting Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.x Thin Films By D.C. Diode Sputtering and Annealing", Bullock et al., Amer. Inst. of Phys. Conf. No. 165, Nov., 1987, pp. 71-78.

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