Rapid solidification processing of oxide superconductors

Details Rapid solidification processing of oxide superconductors Rapid solidification processing of oxide superconductors

1987-07-10

1990-06-26

Morgenstern, Norman

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505730, 505733, 264 8, 264 12, 264 56, 423263, 423604, 423636, H01L 3912, C01D 102, C01F 1700, C01G 302

Patent

active

049372254

ABSTRACT:
A superconducting oxide is melted in an oxygen-rich environment, rapidly solidified and annealed in an oxygen atmosphere. The resulting material has a fine grain structure, is chemically homogeneous, and has enhanced resistance to environmental degradation. The materials have well-defined superconducting characteristics as measured through the temperature dependence of their resistivities and diamagnetic susceptibilities.

REFERENCES:
McKittrick et al., "Crystallization of a Rapidly Solidified Al.sub.2 O.sub.3 -ZrO.sub.2 Eutectic Glass", J. Non-Cryst. Solids, vol. 94, No. 2 (1987), pp. 163-174.
McKittrick et al., "Microstructural Control of Al.sub.2 O.sub.3 -ZrO.sub.2 Ceramics Through Rapid Solidification", Science and Technology of Zirconia-III, Advances in Ceramics, vol. 24 American Ceramic Society, 1988.
De Guire et al., "Magnetic Ordering in Splat-Quenched Spinel Ferrite-Silica Compositions", J. of Magnetism and Magnetic Materials, vol. 54-57 (1986), pp. 1337-1338.
De Guire et al., "Spinel Ferrite-Silica Glass Obtained by Splat Quenching", J. Non-Cryst. Solids, vol. 81 (1986), pp. 351-364.
Geislinger, "Determination of Microstructural Effects on Dielectric Constant in Rapidly Solidified KNbO.sub.3, " B. S. Thesis, Department of Materials Science and Engineering, MIT, Jun., 1987.
Welch et al, Time, May 23, 87.
Wen et al, Beijing Conf., Jun. '87, pp. 97-99.
Ichinose et al, Intro to Fine Ceramics, pp. 145-147.
McKittrick, Adv. Ceram. Mat'ls, vol. 2, No. 3B, Special Issue, Issue Jul. 1987 (pp. 353-363).
Asahi Shinbun Newspaper, Mar. 10, 1987 (English Translation Enclosed).

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