Microcapsule for latent heat storage materials, method for producing same, powder containing microcapsules for latent heat storage materials, and heat storage device comprising said powder

A microcapsule for latent heat storage materials, the microcapsule comprising a metal core containing Zn and Al and a shell covering the metal core,

• wherein the shell of the microcapsule comprises an oxide film containing Zn and O, and an oxide film containing Al and O adjacent to an inner side of the oxide film containing Zn and O;
• wherein the microcapsule comprises 60 to 95 parts by mass of Zn, and 5 to 40 parts by mass of Al, when the total mass of Al and Zn in the microcapsule is 100 parts by mass;
• and
• wherein, when the microcapsule is analyzed by an XRD (X-ray diffractometer) and results are subjected to quantitative analysis using a RIR (Reference Integrity Ratio) method, a mass ratio of ZnAl2O4 in the microcapsule is 4% or less.