Reduction of lattice thermal conductivity in PbTe induced by artificially generated pores

Jae Yeol Hwang; Eun Sung Kim; Syed Waqar Hasan; Soon Mok Choi; Kyu Hyoung Lee; Sung Wng Kim

doi:10.1155/2015/496739

Reduction of lattice thermal conductivity in PbTe induced by artificially generated pores

Jae Yeol Hwang
, Eun Sung Kim
, Syed Waqar Hasan
, Soon Mok Choi
, Kyu Hyoung Lee
, Sung Wng Kim

Department of Energy

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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.

Original language	English
Article number	496739
Journal	Advances in Condensed Matter Physics
Volume	2015
DOIs	https://doi.org/10.1155/2015/496739
State	Published - 2015

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title = "Reduction of lattice thermal conductivity in PbTe induced by artificially generated pores",

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.",

author = "Hwang, \{Jae Yeol\} and Kim, \{Eun Sung\} and Hasan, \{Syed Waqar\} and Choi, \{Soon Mok\} and Lee, \{Kyu Hyoung\} and Kim, \{Sung Wng\}",

note = "Publisher Copyright: {\textcopyright} 2015 Jae-Yeol Hwang et al.",

year = "2015",

doi = "10.1155/2015/496739",

language = "English",

volume = "2015",

journal = "Advances in Condensed Matter Physics",

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T1 - Reduction of lattice thermal conductivity in PbTe induced by artificially generated pores

AU - Hwang, Jae Yeol

AU - Kim, Eun Sung

AU - Hasan, Syed Waqar

AU - Choi, Soon Mok

AU - Lee, Kyu Hyoung

AU - Kim, Sung Wng

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84925654799

U2 - 10.1155/2015/496739

DO - 10.1155/2015/496739

M3 - Article

AN - SCOPUS:84925654799

SN - 1687-8108

VL - 2015

JO - Advances in Condensed Matter Physics

JF - Advances in Condensed Matter Physics

M1 - 496739

ER -

Reduction of lattice thermal conductivity in PbTe induced by artificially generated pores

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