Rare-earth regenerator material particles, and group of rare-earth regenerator material particles, refrigerator and measuring apparatus using the same, and method for manufacturing the same

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United States of America Patent

PATENT NO 9556374
SERIAL NO

13391831

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Abstract

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Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.

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Patent Owner(s)

  • KABUSHIKI KAISHA TOSHIBA;TOSHIBA MATERIALS CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fuse, Keiichi Yokohama, JP 27 85
Yamada, Katsuhiko Yokohama, JP 87 976

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