High thermoelectric figure of merit of Mg2Si0.55Sn0.4Ge0.05 materials doped with Bi and Sb
- 31 October 2013
- journal article
- research article
- Published by Elsevier BV in Scripta Materialia
- Vol. 69 (8), 606-609
- https://doi.org/10.1016/j.scriptamat.2013.07.008
Abstract
Thermoelectric properties of new Bi- and Sb-doped Mg2Si0.55Sn0.4Ge0.05 compounds prepared by powder methods were studied in the temperature range 300–823 K. The materials exhibited compositional inhomogeneites consisting of Sn-rich and Sn-poor areas. Doping with Bi or Sb had a very strong influence on the thermoelectric properties. A high figure of merit was obtained, with a value ∼1.4 for Bi members and ∼1.2 for Sb members at high temperatures. These values are the highest reported on this system.Keywords
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