LATENT HEAT STORAGE BODY, METHOD FOR PRODUCING LATENT HEAT STORAGE BODY AND HEAT EXCHANGE MATERIAL

摘要

In the latent heat storage body (100) according to the present invention, the surface of a core particle (10) composed of a latent heat storage material of a metal or an alloy is coated with an oxidized film of a compositional element of the core particle (10). Hence, the step of separately fabricating the core particle and the oxidized film (20) corresponding to a shell accommodating the core particle and accommodating the core particle inside the shell becomes unnecessary. Further since the core particle exhibits no expansion when transforming from a solid phase to a liquid phase, the component of the melted latent heat storage material stays inside the space covered with the oxidized film and the oxidized film is never damaged. Further, the oxidized film (20) can be made chemically stable.

主权项

1. A latent heat storage body microcapsule, comprising:
a core particle comprising a latent heat storage material of an alloy; and a double film, with which a surface of the core particle is coated, and comprising a compact first oxidized film of a compositional element of the core particle, and a second oxidized film, provided on an outer surface of the compact first oxidized film, of a compositional element of the core particle, wherein the alloy of the core particle is an A-B alloy of at least one alloy component A selected from the following group A with at least one alloy component B selected from the following group B; and a standard free energy (ΔGA0) of oxide formation of the alloy component A and a standard free energy (ΔGB0) of oxide formation of the alloy component B satisfy a relationship of ΔGA0≧ΔGB0: group A: Ca, Si, Bi, Mg, Sb, In, Sn, Al, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Pd, Ag, Au and Pb; and group B: Al, Cr, Mn, Si, Mg, Co and Ni.