A thermoelectric conversion material, a thermoelectric conversion module using the thermoelectric conversion material, and a method for manufacturing the thermoelectric conversion material.

摘要

The thermoelectric conversion material according to the present invention contains Ce, Mn, Fe, and Sb, and is between the main phase having a plurality of crystal grains 101, 102, 103, 104 having a sinterdite structure and the adjacent crystal grains. It is composed of a sintered body having a grain boundary 105, and the grain boundary has a sintering aid phase 106 containing at least Mn, Sb, and O. Therefore, for the sinterdite type thermoelectric conversion material containing Sb, which is a difficult-to-sinter material, the sinterability can be improved while maintaining the practical dimensionless figure of merit ZT, and the process cost can be reduced. can do.