COLD PRESERVATION MATERIAL PARTICLE, COLD PRESERVATION DEVICE, REFRIGERATOR, CRYOGENIC PUMP, SUPERCONDUCTING MAGNET, NUCLEAR MAGNETIC RESONANCE IMAGING DEVICE, NUCLEAR MAGNETIC RESONANCE DEVICE, DEVICE FOR GROWING MONOCRYSTAL BY DRAWING METHOD WITH APPLICATION OF MAGNETIC FIELD, AND METHOD OF PRODUCING PARTICLES OF MATERIAL FOR MAINTAINING COLD Russian patent published in 2024 - IPC F25B9/14 

FIELD: refrigerating equipment.

SUBSTANCE: cold preservation material particle contains at least one first element selected from the group consisting of a rare earth element, silver (Ag) and copper (Cu), and a second element different from the first element and forming a multivalent metal ion in an aqueous solution and oxygen. First phase comprises a first element; and the second phase comprises a second element and is different from the first phase. Atomic concentration of the second element ranges from 0.001 at.% or more to 60 at.%, or less. Maximum value of volumetric specific heat capacity at temperature of 20K and less is 0.3 J/cm³·K and more.

EFFECT: high mechanical strength of the particle of the material to preserve cold.

30 cl, 9 dwg, 7 tbl