Work

Reduction of Lattice Thermal Conductivity in PbTe Induced by Artificially Generated Pores

Year: 2015

Type: article

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 μm) in the PbTe matrix. We obtained extremely low lattice thermal conductivity (~0.56 W m−1 K−1at 773 K) in pore-embedded PbTe bulk after sonication for the elimination of NaCl residue.

Source: Advances in Condensed Matter Physics

DOI: 10.1155/2015/496739

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

Institutions: Institute for Basic Science, Sungkyunkwan University, Korea University of Technology and Education, Kangwon National University

Language: English

Topic: Thermal properties of materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,630

Funders: Ministry of Trade, Industry and Energy, Ministry of Science, ICT and Future Planning, National Research Council of Science and Technology, Korea Institute of Energy Technology Evaluation and Planning