PARTICLE OF MAGNETIC COLD STORAGE MATERIAL, COLD STORAGE DEVICE, REFRIGERATOR, CRYOGENIC PUMP, SUPERCONDUCTING MAGNET, MAGNETIC RESONANCE IMAGING APPARATUS, APPARATUS FOR NUCLEAR MAGNETIC RESONANCE, APPARATUS FOR GROWING MONOCRYSTALS BY DRAWING IN MAGNETIC FIELD, AND DEVICE FOR REPEATED CONDENSATION OF HELIUM Russian patent published in 2024 - IPC C09K5/14 F25B9/00 H01F6/04 A61B5/55 G01N24/00 C30B15/00 

FIELD: refrigerating equipment.

SUBSTANCE: invention can be used in cryogenic engineering. Disclosed is a particle of magnetic cold storage material, consisting of an intermetallic compound containing a rare-earth element and represented by formula RMz, where R is at least one rare-earth element selected from Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb; M is at least one metal element selected from Ni, Co, Cu, Ag, Ga, Bi, Si, Al and Ru; and z is a number in range from 0.001 to 9.0. Percentage of area of voids in cross section of magnetic cold storage material particle is equal to 0.0001% or more and 15% or less. Disclosed is a cold storage device containing a plurality of particles of said magnetic cold storage material, as well as a refrigerator containing a cold storage device. Disclosed are devices comprising such a refrigerator, such as a cryogenic pump, a superconducting magnet, a magnetic resonance imaging apparatus, a nuclear magnetic resonance apparatus, installation for growing monocrystals by drawing in a magnetic field, an apparatus for repeated condensation of helium, having a refrigerator.

EFFECT: inventions make it possible to reduce rate of destruction of cold-accumulating material at prolonged action of vibration caused by operation of refrigerator at cryogenic temperature, to stabilize cooling capacity of refrigerator for a long period of time.

12 cl, 7 dwg, 1 tbl, 27 ex