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나노 구조 물리 연구단
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Reduction of lattice thermal conductivity in PbTe induced by artificially generated pores

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Title
Reduction of lattice thermal conductivity in PbTe induced by artificially generated pores
Author(s)
Jae-Yeol Hwang; Eun Sung Kim; Hasan S.W.; Choi S.-M.; Lee K.H.; Kim S.W.
Publication Date
2015
Journal
ADVANCES IN CONDENSED MATTER PHYSICS, v.2015, no., pp.496739 -
Publisher
HINDAWI PUBLISHING CORPORATION
Abstract
Highly dense pore structure was generated by simple sequential routes using NaCl and PVA as porogens in conventional PbTe thermoelectric materials, and the effect of pores on thermal transport properties was investigated. Compared with the pristine PbTe, the lattice thermal conductivity values of pore-generated PbTe polycrystalline bulks were significantly reduced due to the enhanced phonon scattering by mismatched phonon modes in the presence of pores (200 nm-2 m) in the PbTe matrix. We obtained extremely low lattice thermal conductivity (0.56 W m-1 K-1 at 773 K) in pore-embedded PbTe bulk after sonication for the elimination of NaCl residue. © 2015 Jae-Yeol Hwang et al
URI
http://pr.ibs.re.kr/handle/8788114/1805
DOI
10.1155/2015/496739
ISSN
1687-8108
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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