REBa.sub.2 Cu.sub.3 O.sub.7-y type oxide superconductive materia

Details REBa.sub.2 Cu.sub.3 O.sub.7-y type oxide superconductive materia REBa.sub.2 Cu.sub.3 O.sub.7-y type oxide superconductive materia

1995-04-17

1996-04-16

Bonner, Melissa

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

505780, 505779, 505785, 423593, 423604, 252518, 252521, 501152, 501123, H01L 3912, C01F 1700

Patent

active

055082530

ABSTRACT:
The present invention is characterized in that oxides of Y, Ba and Cu having a superconductive substance-forming composition are melted, the melt is rapidly cooled and solidified, the obtained sheet is heated at a temperature of 1000.degree. to 1350.degree. C. to produce a partially melted state thereof, and the sheet is gradually cooled at a rate lower than 200.degree. C./hr, whereby a micro-structure in which precipitates of the RE.sub.2 BaCuO.sub.5 phase having a diameter smaller than 20 .mu.m are dispersed in the REBa.sub.2 Cu.sub.3 O.sub.7-y crystal is obtained.

REFERENCES:
patent: 4929595 (1990-05-01), Wu
patent: 4937225 (1990-06-01), Kalonji et al.
patent: 4956336 (1990-09-01), Salama et al.
patent: 4970195 (1990-11-01), Bhargava et al.
patent: 4971946 (1990-11-01), Taylor et al.
patent: 4994437 (1991-02-01), Torii et al.
patent: 5077272 (1991-12-01), Chen et al.
patent: 5084436 (1992-01-01), Morimoto et al.
Komatsu, T. et al., "Preparation of High-T.sub.c Superconducting Bi-Ca-Sr-Cu-O Ceramics by the Melt Quenching Method," Japanese Journal of Applied Physics, vol. 27, No. 4 (Apr. 1988) pp. L533-L535.
Morris, P. et al., "Melt Growth of High-Critical-Temperature Superconducting Fibers," Journal of the American Ceramic Society, vol. 71, No. 5 (1988), pp. 334-337, No month.
Matsusaki, K. et al., "Superconductivity above 90 K in Y-Ba-Cu-O Compounds and Their Critical Current Densities at 77 K," Japanese Journal of Applied Physics, vol. 26, No. 5 (May 1987), pp. L624-L626.
Yamada, Y. et al, "Critical Current Density of Wire Type Y-Ba-Cu Oxide Superconductor," Japanese Journal of Applied Physics, vol. 26, No. 5 (May 1987), pp. L865-L866.
Takekawa, S. et al. "Single Crystal Preparation of Ba.sub.2 YCu.sub.3 O.sub.x from Nonstoichiometric Melts," Japanese Journal of Applied Physics, vol. 26, No. 5 (May 1987), pp. L851-L853.
Jin, S. et al., "High critical currents in Y-Ba-Cu-O superconductors," Applied Physics Lett., vol. 52, No. 24 (Jun. 1988), pp. 2074-2076.
Hermann, A. M. et al., "Melt-processible rare earth-Ba-Cu-O superconductors based on molten Ba-Cu oxides," Applied Physics Lett. 51, No. 22 (30 Nov. 1987), pp. 1854-1856.
Swano, K. et al., "Effects of Synthesis Conditions on Microstructure of a YBa.sub.2 Cu.sub.3 O.sub.x Superconductor by Partial Melting Process," Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi, vol. 97, No. 10 (1989), pp. 1028-1033, no month.
Kaiser, D. L. et al., "Growth of YBa.sub.2 Cu.sub.3 O.sub.x single crystals," Applied Physics Lett., vol. 51, No. 13 (28 Sep. 1987), pp. 1040-1042.
Jin, S. et al., "Fabrication of dense Ba.sub.2 YCu.sub.3 O.sub.7-.delta. superconductor wire by molten oxide processing," Applied Physics Lett., vol. 51, No. 12 (21 Sep. 1987), pp. 943-945.
Matsuzaki, K. et al., "Superconductivity above 90 K in Y-Ba-Cu-O Compounds and Their Critical Current Densities at 77 K," Japanese Journal of Applied Physics, vol. 26, No. 5 (May 1987), pp. L624-L626.
Yamada, Y. et al., "Critical Current Density of Wire Type Y-Ba-Cu Oxide Superconductor," Japanese Journal of Applied Physics, vol. 26, No. 5 (May 1987), pp. L865-L866.
Takekawa, S. et al., "Single Crystal Preparation of Ba.sub.2 YCu.sub.3 O.sub.x from Nonstoichiometric Melts," Japanese Journal of Applied Physics, vol. 26, No. 5 (May 1987), pp. L851-L853.
Hirano, S. et al., "Thermal Behavior of Melt-Quenched Products of YBa.sub.2 Cu.sub.3 O.sub.7-.delta. Compound," Nippon-Seramikkusu-Kyokai-Gakujutsu-Ronbunshi, vol. 96, No. 4, (1988), no month pp. 509-511.
Cava, R. et al., "Bulk Superconductivity at 91 K in Single-Phase Oxygen-Deficient Perovskite Ba.sub.2 YCu.sub.3 O.sub.9-.delta. ", The American Physical Society, Physical Review Letters, vol. 58, No. 16 (1987), no month.

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