High thermoelectric performance BiSbTe alloy with unique low-dimensional structure

High thermoelectric performance BiSbTe alloy with unique low-dimensional structure
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具有独特低维结构的高热电性能BiSbTe合金

DOI:
10.1063/1.3143104
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发表时间:
2009-06
影响因子:
3.2
通讯作者:
Tang, Xinfeng
Tang, Xinfeng
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Tritt, Terry M.;Xie, Wenjie;Zhang, Qingjie;Yan, Yonggao;Tang, Xinfeng

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We report a detailed description of an innovative route of a melt spinning (MS) technique combined with a subsequent spark plasma sintering process in order to obtain high performance p-type Bi0.52Sb1.48Te3 bulk material, which possesses a unique low-dimensional structure. The unique structure consists of an amorphous structure, 5–15 nm fine nanocrystalline regions, and coherent interfaces between the resulting nanocrystalline regions. Measurements of the thermopower, electrical conductivity, and thermal conductivity have been performed over a range of temperature of 300–400 K. We found that MS technique can give us considerable control over the resulting nanostructure with good thermal stability during the temperature range of 300–400 K and this unique structure can effectively adjust the transport of phonons and electrons, in a manner such that it is beneficial to the overall thermoelectric performance of the material, primarily a reduction in the lattice thermal conductivity. Subsequently, this results...
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