Granulated particle for cold storage material particle, cold storage material particle, cold storage device, refrigerator, cryopump, superconducting magnet, nuclear magnetic resonance imaging apparatus, nuclear magnetic resonance apparatus, magnetic field application type single crystal pulling apparatus, and helium re-condensing device

Abstract

A granulated particle for cold storage material particle according to an embodiment includes: a rare earth oxysulfide 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 the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; and carbon having a concentration of 0.001 wt % or more and 50 wt % or less, in which the granulated particle has a relative density of 10% or more and 50% or less.

Dependencies are inferred from the claim text.