Method for preparing rare earth-barium-cuprate pre-ceramic resin

Details Method for preparing rare earth-barium-cuprate pre-ceramic resin Method for preparing rare earth-barium-cuprate pre-ceramic resin

1990-10-29

1992-06-16

Dixon, Jr., William R.

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505734, 505738, 505735, 505740, 423593, 423604, 423636, 501123, H01B 1200, H01L 3912

Patent

active

051225107

ABSTRACT:
A method of making high T.sub.c 1-2-3 superconductors having perovskite structure using solution techniques is disclosed. The process uses two solvent systems to form a resinous preceramic material having a controlled viscosity for facilitating its formation into superconducting articles such as fibers, wires, ribbons, films and the like. The process yields a pre-ceramic which is flexible and which has sufficient structural integrity to withstand normal handling.

REFERENCES:
Jpo Abstracts "Production of Superconductive Mat'l" Hirano et al., Feb. 13, 1989, vol. 13, No. 63 Appl. No. 62-90958 Kokai #63-256517.
"Dissolution of YBa.sub.2 Cu.sub.3 O.sub.7-x in Various Solvents" Trolier et al. Am Ceran Sol Bull. 67(4) 759-62 (Apr. 1988).
"Fabrication of VBa.sub.2 Cu.sub.3 O.sub.7-x Fibers Using Modified Sol-bel Method" Uchikawa et al. Apr. 1988 from High Temp. Superconductors Symposium.
Nasu et al. Chemistry Letters The Chemical Society of Japan (1987) "Superconducting V-Ba-Cu-O Films with T.sub.C >70K Prepared by Thermal Decomposition Techniques of Y-, Ba-, and Cu-Z Ethylhexanoates" pp 2403-2404.
Gross et al. Materials Research Society Symposium Proceedings vol. 99 (Nov. 30-Dec. 4, 1987) "A Versatile New Metallorganics Spin On Process for Preparing Superconducting Thin Films".
Ozawa et al. Thermochim. Acta. vol. 133 pp. 11-16 "Application of Thermal Analysis to Kinetic Study of Superconducting Oxide Formation (1988)".
Gupta et al. "Preparation of Superconducting Oxide Films From Metal Trifluoroacetate Solution Processors" ACS Symp. Ser. 377 (Chem. High Temp. Supercond. 2) pp. 265-279 (1988).
Gupta et al. Appl. Phys. Letters vol. 52 No. 24, pp. 2077-2079 "Superconducting Oxide Films with High Transition Temperature Prepared from Metal Trifluoroacetate Precursors (1988)".
Negishi et al. Thermochim. Acta. vol. 140 pp. 41-48 "Thermo-Analytical Investigation of Uttrium Barium Copper Oxide Superconductor" III Preparation from Mixed 2-ethylhexanoate of yttrium, Barium, and Copper (1989).
Nasu et al. J. Mater. Sci Lett. vol. 7 No. 8 pp. 858-860 "Barium Yttrium copper Oxide films with T.sub.c >80K Prepared by the Pyrolysis of 2-ethylhexanoate"(1988).
Vest et al., J. Solid State Chem. vol. 73 No. (1) pp. 283-285 "Superconducting films Prepared Using the Metallorganic Decomposition Technique (1988)".

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