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Regenerator material for extremely low temperatures and regenerator for extremely low temperatures using the same
Regenerator material for extremely low temperatures and regenerator for extremely low temperatures using the same
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机译:用于极低温的蓄热材料和使用该材料的极低温蓄热材料
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摘要
A regenerator material for extremely low temperatures which comprises magnetic regenerator particles in which a rate of particles, which are fractured when a compressive stress of 5 Mpa is applied thereto using a die for mechanical strength evaluation, is not more than 1 wt.%. In this magnetic regenerator particles, a rate of magnetic regenerator particles having more than 1.5 form factor R expressed by L2/4πA, wherein L represents a perimeter of a projected image of each magnetic regenerator particle, and A represents an area of the projected image, is not more than 5%. Such a regenerator material for extremely low temperatures is capable of providing excellent mechanical properties for mechanical vibration with a high reproducibility. A regenerator for extremely low temperatures is formed by filling a regenerator container with a regenerator material for extremely low temperatures comprising the above-mentioned magnetic regenerator particles. Such a regenerator for extremely low temperatures can show excellent refrigerating performance for a long period of time.
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