Structure and thermoelectric properties of bismuth telluride—Carbon composites
Carbon nanotubes and amorphous carbon have been introduced into a bismuth telluride matrix (0.15 and 0.30 wt.% ratio) to investigate the influence of the carbon on the composite’s thermoelectric properties. Composites with well-dispersed additives have been obtained by sonication and ball-milling methodology. Carbon nanotubes and an amorphous carbon addition led to a decrease in electric conductivity from 1120 S/cm to 77 S/cm. The absolute value of the Seebeck coefficient was found to be reduced, changing from −113 μV/K +2 μV/K, this is attributed to electron trapping by an amorphous carbon. For all investigated composites the phonon contribution of the thermal conductivity increased in comparison with a specimen without carbon additives.
3Web of Science
Bartosz Jakub Trawiński, Beata Bochentyn, Natalia Gostkowska, Marcin Stanisław Łapiński, Tadeusz Miruszewski, Bogusław Kusz. (2018). Structure and thermoelectric properties of bismuth telluride—Carbon composites, 99, 10-17. https://doi.org/10.1016/j.materresbull.2017.10.043
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