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题名: Thermoelectric Properties of Compacted Bi2-xSbxTe3-δ Nanoplatelets with Nominal Composition of x = 1.5
作者: Liu, Chia-Jyi;Liu, Gao-Jhih;Chen, Liang-Ru
贡献者: 物理學系
关键词: Thermoelectric materials;Bismuth tellurides;Hydrothermal synthesis
日期: 2011-09
上传时间: 2012-09-10T06:15:36Z
摘要: Nanoplatelets of Bi2-xSbxTe3-δ with nominal composition of x = 1.5 are synthesized using
hydrothermal methods [1,2]. The resulting powders are cold pressed and sintered in an
evacuated ampoule at various temperatures between 300 and 360°C. The effects of sintering
temperature on the thermoelectric properties of compacted Bi2-xSbxTe3- are investigated. We
find that the compacted Bi2-xSbxTe3-δ sample sintered at 340°C has the highest power factor of
11.6 μW/cm-K2 and its thermal conductivity is 0.37 W/m K at 295 K. The resulting
dimensionless figure of merit ZT is 0.93 at 295 K. Hall effect measurements are also carried
out to study the scattering mechanism for samples sintered at different temperatures.
關聯: 9th European Conference on Thermoelectrics, Thessaloniki, September 28-30, 2011, GREECE
显示于类别:[物理學系] 會議論文


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