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Thermoelectric Characteristics of the p-type (Bi, Sb)(2)Te-3 Nanocomposites Processed with Silicon Nanodispersion
- Authors
- Kim, M. Y.; Yu, B. K.; Choi, J. Y.; Oh, T. S.
- Issue Date
- Oct-2014
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Thermoelectrics; Bismuth Antimony Telluride; Nanocomposite; Nanodispersion; Figure of Merit
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.14, no.10, pp.7855 - 7859
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 14
- Number
- 10
- Start Page
- 7855
- End Page
- 7859
- ISSN
- 1533-4880
- Abstract
- The p-type (Bi0.2Sb0.8)(2)Te-3 powders were mechanically alloyed and hot pressed at 500 degrees C for 30 minutes with dispersion of Si nanopowders up to 3 vol%. The thermal conductivity of the (Bi0.2Sb0.8)(2)Te-3 nanocomposite was substantially reduced with dispersion of 0.3 similar to 3 vol% Si nanopowders due to the enhanced phonon scattering. The maximum dimensionless figure-of-merit of 1.32 at 75 degrees C was obtained for the (Bi0.2Sb0.8)(2)Te-3 nanocomposite dispersed with 1 vol% Si nanopowders, compared to 1.08 of the specimen without Si nanopowder dispersion.
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