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나노 구조 물리 연구단
나노구조물리 연구단
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Formation of Dense Pore Structure by Te Addition in Bi0.5Sb1.5Te3: An Approach to Minimize Lattice Thermal Conductivity

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Title
Formation of Dense Pore Structure by Te Addition in Bi0.5Sb1.5Te3: An Approach to Minimize Lattice Thermal Conductivity
Author(s)
Hasan, Syed Waqar; Mun, Hyeona; Kim, Sang Il; Cho, Jung Young; Roh, Jong Wook; Yang, Sangsun; Choi, Soon-Mok; Lee, Kyu Hyoung; Sung Wng Kim
Publication Date
2013
Journal
JOURNAL OF NANOMATERIALS, v.2013, no., pp.905389 -
Publisher
HINDAWI PUBLISHING CORPORATION
Abstract
We herein report the electronic and thermal transport properties of p-type Bi0.5Sb1.5Te3 polycrystalline bulks with dense pore structure. Dense pore structure was fabricated by vaporization of residual Te during the pressureless annealing of spark plasma sintered bulks of Te coated Bi0.5Sb1.5Te3 powders. The lattice thermal conductivity was effectively reduced to the value of 0.35 W m-1 K-1 at 300 K mainly due to the phonon scattering by pores, while the power factor was not significantly affected. An enhanced ZT of 1.24 at 300 K was obtained in spark plasma sintered and annealed bulks of 3 wt.% Te coated Bi0.5Sb1.5Te3 by these synergetic effects. © 2013 Syed Waqar Hasan et al.
URI
http://pr.ibs.re.kr/handle/8788114/1408
DOI
10.1155/2013/905389
ISSN
1687-4110
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
324_(2013)Formation_of_dense_pore_structure_by_Te_addition_in_BST(J.nanomaterials).pdfDownload

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