Tohoku University Technology: Mg2Si thermoelectric conversion film with reduced thermal conductivity while keeping electrical conductivity: T20-338
Mg2Si film with high porosity and uniform vacancies
The development of thermoelectric conversion technology to extract electricity from waste heat is being actively pursued. Mg2Si is a thermoelectric conversion material suitable for the use of industrial waste heat since the thermoelectric conversion efficiency achieves its maximum value at around 300ºC environment. However, the heat is often leaked due to its high thermal conductivity so the conversion efficiency is not as high as expected (cf. right formula). There is a report that the thermal conductivity was decreased by compacting Mg2Si powder into pellet and making it porous, but since the electrical conductivity was also reduced due the grain boundary, the conversion efficiency was not increased. This invention is about a Mg2Si porous film that solves the above issue.
- Company：Tohoku Techno Arch Co., Ltd.
- Price：Other
