Method of manufacturing an electrical contact for a superconduct

Details Method of manufacturing an electrical contact for a superconduct Method of manufacturing an electrical contact for a superconduct

1992-06-03

1994-03-01

King, Roy

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505706, 427 62, 427123, 427125, 427299, B05D 512

Patent

active

052907600

ABSTRACT:
A method of manufacturing an electrical contact between a current lead and a part made of a superconductive ceramic of the type RBa.sub.2 Cu.sub.3 O.sub.y, where R designates a lanthanide chosen from Y, La, Nd, Sm, Eu, Gd, Ho, Er, Tm, Yb, and Lu, and where y lies in the range 6.9 to 7, in which method a layer of a material based on a silver-containing resin is deposited on said part, the part is dried, and is then heat treated in oxygen by being heated to a temperature greater than 900.degree. C., and then cooled, with the temperature dwelling at 450.degree. C. for a certain length of time corresponding to the phase during which said ceramic is reoxygenated.

REFERENCES:
patent: 4963523 (1990-10-01), Ekin et al.
IEEE Transactions on Magnetics, vol. 27, No. 2, Mar. 1991, New York, US, pp. 1866-1869; F. Grivon et al.: "YBaCuO current lead for Helium temperature applications".
Journal of Applied Physics, vol. 65, No. 4, Feb. 15, 1989, New York, US, pp. 1792-1794; J. D. Katz et al.: "Low-resistivity, YBa2Cu307-to-silver electrical contacts by plasma spraying".
Journal of the Electrochemical Society, vol. 135, No. 5, May 1988, Manchester, New Hampshire, US, pp. 1309-1310; Y. Tzeng: "Fabrication of electrical contacts to YBa2Cu307-x superconductor by molten silver processing".
Soviet Technical Physics Letters, vol. 15, No. 5, 1989, New York, US, pp. 345-346; V. G. Bessergenev et al: "Electrical Properties of Ag-YBaCu307-x contacts at 20-800.degree. C.".
Chemical Abstracts, vol. 94, No. 57, 1981, Columbus, Ohio, US; abstract No. 35356P, p. 307; column 1; & JP-A-8 086 183 (Tokyo Shibaura Electric Co) Jun. 28, 1980.

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