Method of producing YBa.sub.2 Cu.sub.3 O.sub.6+x superconductors

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k

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264 66, 505725, 505779, 505780, H01L 3912

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049835718

ABSTRACT:
A method for improving the superconducting transition temperature of the MBa.sub.2 Cu.sub.3 O.sub.x where M is selected from the group consisting of Y, Er, Eu, Yb, Dy and Ho and where x is a value of from 6 to 7 ceramic by utilizing specific sequences of heat treating times and temperatures in conjunction with the use of silver oxide in making superconducting devices or wires for ultimate use in motors, generators and electrical circuits.

REFERENCES:
patent: 4826808 (1989-05-01), Yurek et al.
Wallace et al., Journal of Superconductivity, "Processing High-Density, F Grained Ba.sub.2 YCu.sub.3 O, Superconductors" (1988).
Goodenough, Mat. Res. Bull., "Oxygen Ordering . . . in YBa.sub.2 Cu.sub.3 O.sub.7-8 " (1988).
Matsuda et al., The American Physical Society, "Electronic Properties of Ba.sub.2 Y.sub.1-x Pr.sub.x Cu.sub.3 O.sub.7-8 " (Aug. 1988).
Orlando et al., Phys. Review Letters, "Upper Critical Fields . . . YBa.sub.2 Cu.sub.3 O.sub.7-y " (May, 1987).
Yuzhen, International Journal of Modern Physics, "Superconductors with . . . Ln-Ba-Cu-O System" (1987).

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