Patent ID: 7981532

Claim:
A thermal control device having a phase-change substance layer for controlling a temperature of an object by forming the layer on the object, in which the phase-change substance layer comprises a phase-change substance, which has an insulating property in a higher-temperature phase and has a metallic property in a lower-temperature phase, and which has a larger heat-emitting amount in the higher-temperature phase and has a smaller heat-emitting amount in the lower-temperature phase, wherein: the thickness of the phase-change substance layer is in the range of 200 nm and 100 μm, and the phase-change substance is an Mn-containing perovskite oxide represented by (A 1−x B x )Mn 1+y O 3 , in which a phase-transition temperature of the Mn-containing oxide represented by (A 1−x B x )Mn 1+y O 3 is higher than that of an Mn-containing perovskite oxide represented by (A 1−x B x )MnO 3 ; A represents at least one of rare-earth ions of La, Pr, Nd, and Sm; B represents any one of (a) Ba, (b) Ca and Sr, (c) Ca and Ba, (d) Sr and Ba, and (e) Ca, Sr and Ba; 0≦x<1; and 0.005≦y≦0.1.