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Development of bismuth tellurium selenide nanoparticles for thermoelectric applications via a chemical synthetic process

Title
Development of bismuth tellurium selenide nanoparticles for thermoelectric applications via a chemical synthetic process
Authors
Kim, C[Kim, Cham]Kim, DH[Kim, Dong Hwan]Han, YS[Han, Yoon Soo]Chung, JS[Chung, Jong Shik]Park, S[Park, SangHa]Park, S[Park, Soonheum]Kim, H[Kim, Hoyoung]
DGIST Authors
Kim, C[Kim, Cham]Kim, DH[Kim, Dong Hwan]; Han, YS[Han, Yoon Soo]; Kim, H[Kim, Hoyoung]
Issue Date
2011-03
Citation
Materials Research Bulletin, 46(3), 407-412
Type
Article
Article Type
Article
Keywords
A. Inorganic CompoundsB. Chemical SynthesisBismuthBismuth CompoundsC. Electron MicroscopyC. X-Ray DiffractionD. Thermal ConductivityDiffractionInorganic CompoundsKetonesNano-Crystalline PowdersNanoparticlesOrganic AcidsSeleniumSpark Plasma SinteringSynthesis (Chemical)TelluriumTellurium CompoundsThermal ConductivityThermo-ElectricityX Ray Diffraction
ISSN
0025-5408
Abstract
Bismuth tellurium selenide (Bi2TeySe3-y) nanoparticles for thermoelectric applications are successfully prepared via a water-based chemical reaction under atmospheric conditions. The nanostructured compound is prepared using a complexing agent (ethylenediaminetetraacetic acid) and a reducing agent (ascorbic acid) to stabilize the bismuth precursor (Bi(NO3)3) in water and to favor the reaction with reduced sources of tellurium and selenium. The resulting powder is smaller than ca. 100 nm and has a crystalline structure corresponding to the rhombohedral Bi 2Te2.7Se0.3. The nanocrystalline powder is sintered via a spark plasma sintering process to obtain a sintered body composed of nano-sized grains. Important transport properties of the sintered body are measured to calculate its most important characteristic, the thermoelectric performance. The results demonstrate a relationship between the nanostructure of the sintered body and its thermal conductivity. © 2010 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3459
DOI
10.1016/j.materresbull.2010.12.004
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
ETC1. Journal Articles


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