MAGNESIUM-BASED THERMOELECTRIC CONVERSION MATERIAL, MAGNESIUM-BASED THERMOELECTRIC CONVERSION ELEMENT, THERMOELECTRIC CONVERSION DEVICE, AND METHOD FOR MANUFACTURING MAGNESIUM-BASED THERMOELECTRIC CONVERSION MATERIAL

摘要

A magnesium-based thermoelectric conversion material includes a first layer formed of Mg₂Si and a second layer formed of Mg₂Si_xSn_1-x (here, x is equal to or greater than 0 and less than 1), in which the first layer and the second layer are directly joined to each other, and within a junction surface with the first layer and in the vicinity of the junction surface, the second layer has a tin concentration transition region in which a tin concentration increases as a distance from the junction surface increases. The junction layer is regarded as a site in which a tin concentration is found to be equal to or lower than a detection limit by the measurement performed using EDX.