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Thermoelectric properties of p-type (Bi,Sb)(2)Te-3 nanocomposites dispersed with multiwall carbon nanotubes
- Authors
- Yeo, Y. H.; Oh, T. S.
- Issue Date
- Oct-2014
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Composites; Chalcogenides; Nanostructures; spectroscopy; Thermoelectrics
- Citation
- MATERIALS RESEARCH BULLETIN, v.58, pp.54 - 58
- Journal Title
- MATERIALS RESEARCH BULLETIN
- Volume
- 58
- Start Page
- 54
- End Page
- 58
- ISSN
- 0025-5408
- Abstract
- p-type (Bi0.2Sb0.8)(2)Te-3 nanocomposites were prepared by hot-pressing mechanically alloyed (Bi0.2Sb0.8)(2)Te-3 powders with a dispersion of 0-0.25 wt% multiwall carbon nanotubes. The thermal conductivity of the (Bi0.2Sb0.8)(2)Te-3 nanocomposite was substantially reduced from 0.98 W/m x K to 0.71 W/m x K at 75 degrees C with a dispersion of 0.12 wt% multiwall carbon nanotubes. The dimensionless figure-of-merit of the (Bi0.2Sb0.8)(2)Te-3 nanocomposite was remarkably enhanced from 1.03 to 1.47 at 75 degrees C by dispersion with 0.12 wt% multiwall carbon nanotubes. An exceptionally high dimensionless figure-ofmerit of 1.41 at room temperature was also obtained for the nanocomposite dispersed with 0.12 wt% multiwall carbon nanotubes. (C) 2014 Elsevier Ltd. All rights reserved.
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