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Fabrication of bismuth telluride nanoparticles using a chemical synthetic process and their thermoelectric evaluations
- Fabrication of bismuth telluride nanoparticles using a chemical synthetic process and their thermoelectric evaluations
- Kim, Cham; Kim, Dong Hwan; Han, Yoon Soo; Chung, Jong Shik; Park, SangHa; Kim, Hoyoung
- DGIST Authors
- Kim, Cham; Kim, Dong Hwan; Kim, Hoyoung
- Issue Date
- Powder Technology, 214(3), 463-468
- Article Type
- Ascorbic Acid; Ascorbic Acids; Bi2Te3; Bismuth; Bismuth Compounds; Bismuth Nitrate; Bismuth Telluride; Bismuth Tellurium; Chemical Procedures; Chemical Synthesis; Complexing Agents; Controlled Study; Crystal Structure; Crystalline Structure; Edetic Acid; Electric Conductivity; Electric Resistance; Electrical Resistivity; Ethylene Diamine Tetra-Acetic Acid; Ketones; Light Scattering; Materials Testing; Molecular Stability; Nano-Crystalline Powders; Nano-Sized Grains; Nanoanalysis; Nanocrystal; Nanofabrication; Nanoparticle; Nanoparticles; Organic Acids; Particle Size; Powder; Process Development; Sintered Body; Sintering; Spark Plasma Sintering; Spark Plasma Sintering Process; Synthesis (Chemical); Synthetic Process; Tellurium; Tellurium Compounds; Tellurium Derivative; Temperature Dependence; Thermal Conductivity; Thermo-Electric Application; Thermo-Electric Performance; Thermo-Electrics; Transport Properties; Unclassified Drug; Water Based
- Bismuth telluride nanoparticles for thermoelectric applications were successfully prepared via a water-based chemical reaction. In this process, we used both 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 the reduced source of tellurium. The resulting powder was confirmed to range in size below ca. 100nm with the crystalline structure corresponding to the rhmobohedral Bi2Te3. We sintered the nanocrystalline powder via a spark plasma sintering process, thus we obtained the sintered body composed of nano-sized grains. Then, we measured some important transport properties (electrical resistivity, Seebeck coefficient, and thermal conductivity) of the sintered body to calculate its thermoelectric performance, the figure of merit. Finally, we discussed the effect of the nanostructure in the sintered body on the thermal conductivity. © 2011 Elsevier B.V.
- Elsevier B.V.
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- Magnet-Controlled Materials Research Group1. Journal Articles
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