Cryogenic regenerator material and cryogenic regenerator and refrigerator using the same

摘要

PURPOSE:To provide a cryogenic cold accumulation material and a cold accumulator using the same in which gaps among cold accumulation substance particles can be stably held even if a stress, a thermal impact, etc., is applied to gas flow during operation and performance of the accumulator can be maintained for a long period. CONSTITUTION:A cryogenic cold accumulation material has particles of cold accumulation substance having a specific heat of 0.1j/cm3K or more at 30K or lower such as magnetic intermetallic compound containing Pb, Pb alloy and rare earth element. The particles of the substance are fixed thereamong by sintering the substance at a temperature lower than its melting point. A cryogenic cold accumulator uses the sintered material at least as part of the material.