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

1989-11-28

1992-03-31

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

051008718

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 system to form a resinous pre-ceramic 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 Material", Hirano et al., 2/13/89, vol. 13, No. 63 App. 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. Ceram. Soc. Bull. 67 (4) 759-62 (Apr. 1988).
"Fabrication of YBa.sub.2 Cu.sub.3 O.sub.7-x Fibers Using Modified Sol Gel Method", Uchikawa et al., Apr. 1988, from High Temp. Superconductors Symposium.
Nasu et al., Chemistry Letters, The Chemical Society of Japan (1987), Superconducting Y--Ba--Cu--O Films with Tc>70K Prepared by Thermal Decomposition Technique of Y--, Ba--, and Cu-- Zethylhexanoates, pp. 2403-2404.
Gross et al., Materials Research Society Symposium Proceedings, vol. 99 (Nov. 30-Dec. 4 1987), Gross et al., "A Versatile New Metalloorganic 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 Precursors", ACS Symp. Ser. 377 (Chem. High Temp. Supercond. 2), pp. 265-279 (1988).
Gupta et al., Appl. Physics 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, "Thermoanalytical Investigation of Yttrium Barium Copper Oxide Superconductor", III, Preparation from Mixed 2-ethylhexanoates of Yttrium, Barium, and Copper (1989).
Nasu et al., J. Meter. Sci. Lett., vol. 7, No. 8, pp. 858-860, "Barium Yttrium Copper Oxide Films with Tc>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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