Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1988-08-08
1991-04-09
Hille, Rolf
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
357 87, 357 83, 357 84, 357 82, 136203, 136204, 505894, 505897, H01L 2504, H01L 3528, F25B 2100
Patent
active
050065050
ABSTRACT:
A practical cryogenic Peltier cooler is devised by replacing one of the semiconducting elements in a conventional peltier cooler with an element comprised of bulk, or thin film superconducting material. In the preferred embodiment, a rare-earth, a barium copper oxide superconductor of the form Yb.sub.a Cu.sub.3 O.sub.x is utilized. The superconducing elements are placed in an alternating series with semiconducting elements comprised of bismuth telluride of the form Bi.sub.2 Te.sub.3 (n-type). Performance may be improved in an alternative embodiment by utilizing instead a bismuth antimony semiconductor of the form Bi.sub.85 Sb.sub.15 (n-type). As a result, cryogenic Peltier coolers can be devised with useful refrigeration capacities and stable cold temperatures of 65-80 degrees Kelvin and below, while heat sinked to a higher temperature.
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H. J. Goldsmit et al., "High-Tc Superconductors as Passive Themo-Elements", Feb. 1988, pp. 344-348, p. 345, p. 347. Journal of Physics D/Applied Physics, vol. 21, No. 2.
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Brown C. D.
Denson-Low W. K.
Heald R. M.
Hille Rolf
Hughes Aircraft Company
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