Journal
SCRIPTA MATERIALIA
Volume 127, Issue -, Pages 63-67Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.09.010
Keywords
Thermoelectric materials; Spark plasma sintering; Mechanical alloying; Silicon germanium; Nanocomposite
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Funding
- Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST MISiS
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We report on thermoelectric properties of p-type boron doped nanostructured bulk Si80Ge20 synthesized via spark plasma technique. We demonstrate that the presence of a limited amount of nanometer-sized SiO2 inclusions, resulting from the oxidation during processing stages is an effective way to further thermal conductivity reduction in the nanostructured Si80Ge20 alloys. Significant reduction of thermal conductivity and high values of Seebeck coefficient allowed us to reach a peak ZT value of about 0.72 at 800 degrees C in boron doped Si80Ge20. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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