Magnetic refrigerant for magnetic refrigeration

Details Magnetic refrigerant for magnetic refrigeration Magnetic refrigerant for magnetic refrigeration

1986-01-30

1989-07-18

Sheehan, John P.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

148301, 148400, 420416, C22B 0000

Patent

active

048490172

ABSTRACT:
A magnetic refrigerant for magnetic refrigeration which comprises a sintered body containing at least one of rare earth elements selected from the group consisting of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and yttrium and a balance consisting essentially of at least one of aluminum, nickel and cobalt.
This invention provides sintered magnetic bodies which are suited for use as magnetic refrigerants, and also provides significant contribution to the performance improvement of magnetic refrigerators and to the materialization of regenerator-type magnetic refrigerants.

REFERENCES:
patent: 3447912 (1969-06-01), Ortner et al.
patent: 3560200 (1971-02-01), Nesbitt et al.
patent: 4003767 (1977-01-01), Bachmann et al.
patent: 4378258 (1983-03-01), Clark et al.
T. Hashimoto et al., "The Magnetic Refrigeration Characteristics of Several Magnetic Refrigerants Below 20K: I Magnetcaloric Effect" proceedings of ICEC, vol. 9, May, 1982, pp. 26-29.
C. B. Zimm et al., "Low Hysteresis Materials for Magnetic Refrigeration: Gd.sub.1-x ER.sub.x Al.sub.2 a)", Journal of Applied Physics, vol. 55, No. 6, Mar. 15, 1984, pp. 2509-2510.
F. Pourarian, "Exchange-Striction of Rare Earth-Al.sub.2 Laves Phase Compounds", J. Phys. Chem Solids, vol. 41, No. 2, 1980, pp. 123-127.

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