Journal
MATERIALS RESEARCH BULLETIN
Volume 58, Issue -, Pages 54-58Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2014.04.046
Keywords
Composites; Chalcogenides; Nanostructures; spectroscopy; Thermoelectrics
Categories
Funding
- Basic Science Research Programs of the National Research Foundation of Korea [2011-0029443]
- National Research Foundation of Korea [2011-0029443] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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