Mg—Si system thermoelectric conversion material, method for producing same, sintered body for thermoelectric conversion, thermoelectric conversion element, and thermoelectric conversion module

摘要

Provided are: an Mg—Si system thermoelectric conversion material which exhibits stably high thermoelectric conversion performance; a sintered body for thermoelectric conversion, which uses this Mg—Si system thermoelectric conversion material; a thermoelectric conversion element having excellent durability; and a thermoelectric conversion module. A method for producing an Mg—Si system thermoelectric conversion material according to the present invention comprises a step for heating and melting a starting material composition that contains Mg, Si, Sb and Zn. It is preferable that the contents of Sb and Zn in the starting material composition are respectively 0.1-3.0 at % in terms of atomic weight ratio.

主权项

1. An Mg—Si system thermoelectric conversion material expressed by: a chemical composition formula: Mg66.7-aSi33.3-bSbxZnyAz (A represents one or more types of elements selected from a group consisting of Al, Bi, P, Ga, As, In, Ag, Cu, Au, Ni, Fe, Mn, Co, Ta, Nd, Nb, and Pb, x, y, and z satisfy conditions of 0.1≦x≦3.0, 0.1≦y≦3.0, 0≦z≦3.0, and 0.2≦x+y+z≦5.0, a and b are positive numbers and satisfy a condition of a+b=x+y+z.).