COLD STORAGE MATERIAL, REFRIGERATOR, DEVICE INCORPORATING SUPERCONDUCTING COIL, AND METHOD OF MANUFACTURING COLD STORAGE MATERIAL
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United States of America Patent
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Issued Date -
Jan 5, 2023
app pub date -
Aug 31, 2022
filing date -
Aug 31, 2022
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Abstract
A cold storage material, which has a large specific heat and a small magnetization in an extremely low temperature region and has satisfactory manufacturability, is provided, and a method for manufacturing the same is provided. Further, a refrigerator having high efficiency and excellent cooling performance is provided by filling this refrigerator with the above-described cold storage material. Moreover, a device incorporating a superconducting coil capable of reducing influence of magnetic noise derived from a cold storage material is provided. The cold storage material of embodiments is a granular body composed of an intermetallic compound in which the ThCr2Si2-type structure 11 occupies 80% by volume or more, and has a crystallite size of 70 nm or less.
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