Thermal storage particle, composition for constant temperature device and constant temperature device

摘要

Provided is a heat storage particle having high moisture resistance and high thermal responsiveness. A ceramic particle comprising vanadium oxide as a main component and a metal coating for coating the ceramic particle are provided. The main component of the metal film is, for example, Ni. The thickness of the metal film is, for example, 5 nm or more and 5 μm or less. As the vanadium oxide, for example, one or more vanadium oxides represented by the formula: V1-xMxO2 are used. M is W, Ta, Mo or Nb, and X is 0 or more and 0.05 or less.