THERMOELECTRIC CONVERSION MATERIAL AND THERMOELECTRIC CONVERSION ELEMENT

摘要

The present invention provides a thermoelectric conversion material with stable thermoelectric conversion properties such as power factor in air at high temperature. The thermoelectric conversion material comprises a mixed metal oxide comprising M 1 , M 2A and M 2B as metal elements at a molar ratio of M 1 :M 2A :M 2B of 2:1:1 and having a perovskite crystal structure, wherein M 1 represents at least one M 1A selected from the group consisting of La, Y and lanthanoid elements, or a combination of M 1A and at least one M 1B selected from among alkaline earth metal elements, M 2A represents at least one selected from the group consisting of metal elements each of which can have an atomic valence of 2, M 2B represents at least one selected from the group consisting of metal elements each of which can have an atomic valence of 4, M 1 , M 2A and M 2B are different from one another, and each of M 2A and M 2B may contain a doping element.