Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
Volume 57, Issue 4, Pages 1037-1040Publisher
KOREAN PHYSICAL SOC
DOI: 10.3938/jkps.57.1037
Keywords
Bismuth telluride; Nanoparticles; Polyol; Thermoelectric properties
Categories
Funding
- Ministry of Knowledge Economy (MKE), Republic of Korea
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Bismuth-telluride (Bi2Te3) nanoparticles have been synthesized by using BiCl3 and TeCl4 as reactants, ethyleneglycol as the polyol solvent. The microstructures showed that the synthesized bismuth telluride nanoparticles had the 200 nm-sized polycrystalline structures resulting from aggregates of nanocrystallites. The X-ray diffraction (XRD) results revealed that the phase of the nanoparticles consisted of mainly Bi2Te3. The sintered Bi2Te3 materials exhibited grain size of 300 nm and significantly decreased the thermal conductivities compared to those of micro-grained bulk materials due to increased phonon-scattering at the nanograin boundaries.
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