Synthesis and Thermoelectric Properties of Carbon Nanotube-Dispersed Bi<sub>2</sub>Te<sub>3</sub> Matrix Composite Powders by Chemical Routes

Kyung Tae Kim; Injoon Son; Gook Hyun Ha

doi:10.4150/KPMI.2013.20.5.345

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Synthesis and Thermoelectric Properties of Carbon Nanotube-Dispersed Bi₂Te₃ Matrix Composite Powders by Chemical Routes: Kyung Tae Kim, Injoon Son, Gook Hyun Ha; Journal of Korean Powder Metallurgy Institute 2013;20(5):345-349
DOI: https://doi.org/10.4150/KPMI.2013.20.5.345

¹Powder & Ceramic Materials Division, Korea Institute of Materials Science
²School of Materials Science and Engineering, Kyungpook National University
³Powder & Ceramic Materials Division, Korea Institute of Materials Science

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Abstract

Carbon nanotube-dispersed bismuth telluride matrix (CNT/Bi_2Te_3) nanopowders were synthesized by chemical routes followed by a ball-milling process. The microstructures of the synthesized CNT/Bi_2Te_3 nanopowders showed the characteristic microstructure of CNTs dispersed among disc-shaped Bi_2Te_3 nanopowders with as an average size of 500 nm in-plane and a few tens of nm in thickness. The prepared nanopowders were sintered into composites with a homogeneous dispersion of CNTs in a Bi_2Te_3 matrix. The dimensionless figure-of-merit of the composite showed an enhanced value compared to that of pure Bi_2Te_3 at the room temperature due to the reduced thermal conductivity and increased electrical conductivity with the addition of CNTs.

Keywords: Carbon nanotube;Bismuth telluride;Thermoelectric properties;

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