Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis and Thermoelectric Properties of Carbon Nanotube-Dispersed Bi2Te3 Matrix Composite Powders by Chemical Routes

  • Kim, Kyung Tae (Powder & Ceramic Materials Division, Korea Institute of Materials Science) ;
  • Son, Injoon (School of Materials Science and Engineering, Kyungpook National University) ;
  • Ha, Gook Hyun (Powder & Ceramic Materials Division, Korea Institute of Materials Science)
  • Received : 2013.10.01
  • Accepted : 2013.10.24
  • Published : 2013.10.28
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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.

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