GRANULAR PARTICLE USED FOR REFRIGERATING CHAMBER MATERIAL PARTICLE, REFRIGERATING CHAMBER MATERIAL PARTICLE, REFRIGERATING CHAMBER DEVICE, REFRIGERATOR, CRYOGENIC VACUUM PUMP, SUPERCONDUCTING MAGNET, NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS, NUCLEAR MAGNETIC RESONANCE APPARATUS, INSTALLATION FOR DRAWING MONOCRYSTALS WITH APPLICATION OF MAGNETIC FIELD AND HELIUM RECONDENSATION DEVICE Russian patent published in 2025 - IPC C09K5/14 F25B9/00 H01F6/04 A61B5/55 G01N24/00 C30B15/00 F28D20/00 C04B35/50 C04B35/52 C04B35/547 

FIELD: chemistry.

SUBSTANCE: invention can be used in cryogenic engineering. Disclosed is a granular particle used for a particle of material of a refrigerating chamber. Granular particle contains rare-earth oxysulphide containing at least one rare-earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, or a rare-earth oxide containing at least one rare-earth element selected from a group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and carbon having concentration of 0.001 wt.% or more up to 50 wt.% or less. Granular particle has a relative density of 10% or more to 50% or less, wherein relative density of granulated particles is calculated by dividing average density during moulding, obtained for 50 granulated particles, by true density of constituent material. Also disclosed is a refrigerating chamber material particle, a refrigerating chamber, a refrigerator, a cryogenic vacuum pump, a superconducting magnet, apparatus for imaging nuclear magnetic resonance, apparatus based on nuclear magnetic resonance, apparatus for extracting monocrystals with application of a magnetic field and a device for helium recondensation.

EFFECT: invention makes it possible to reduce costs for production of particles of material of refrigerating chamber, to reduce reduction of strength and specific heat capacity of such particles.

21 cl, 8 dwg, 3 tbl, 48 ex