Grain Structure Induced Thermoelectric Properties in PbTe Nanocomposites

被引：26
作者：
Paul, Biplab [1 ]
Banerji, Palllab [1 ]
机构：
[1] Indian Inst Technol, Ctr Mat Sci, Kharagpur 721302, W Bengal, India
来源：
NANOSCIENCE AND NANOTECHNOLOGY LETTERS | 2009年 / 1卷 / 03期
关键词：
PbTe; Chemical Synthesis; Nanocomposites; Structure-Property Relationships; Thermoelectrics;
D O I：
10.1166/nnl.2009.1041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
PbTe nanocomposites have been prepared from PbTe nanocrystals, synthesized via chemical route, by compaction under high pressure and temperature. The thermoelectric (TE) properties are found to vary with the shape and size of the composites' nanostructures. Transport properties of PbTe nanocomposites have been evaluated through temperature dependent electrical conductivity, Seebeck coefficient and room temperature thermal conductivity measurements. A remarkable enhancement in power factor and reduction in thermal conductivity compared to bulk polycrystalline PbTe have been observed. The highest power factor of the specimen is found to be 18.72 x 10(-4) Wm(-1)K(-2) with a room temperature thermal conductivity of 1.69 Wm(-1)K(-1).
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收藏
页码：208 / 212
页数：5
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