Fabrication and property of high-performance Ag-Pb-Sb-Te system semiconducting thermoelectric materials
Fabrication and property of high-performance Ag-Pb-Sb-Te system semiconducting thermoelectric materials
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DOI：
10.1007/s11434-007-0124-1
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发表时间：
2007-04
影响因子：
--
通讯作者：
Zhou Min;L. Jingfeng;Wang Heng
中科院分区：
文献类型：
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作者：
Zhou Min;L. Jingfeng;Wang Heng
采用机械合金化和放电等离子烧结相结合的方法制备了高性能Ag-Pb-Sb-Te系热电块体材料。采用X射线衍射（XRD）和扫描电镜（SEM）分析了材料的相组成和显微结构。重点研究了化学成分，特别是Pb含量对Ag0.8Pb18+ xSbTe 20样品热电性能的影响，包括电阻率、Seebeck系数、功率因数、热导率和无因次优值。结果表明，Ag0.8Pb18+ xSbTe 20样品的最佳组成为Ag0.8Pb22.5SbTe20，在673 K时最大优值（ZT）为1.2。
High performance Ag-Pb-Sb-Te system thermoelectric bulk materials were fabricated by a combination of mechanical alloying (MA) and spark plasma sintering (SPS). Phase composition and microstructure of the resultant materials were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. A special emphasis was paid to the effects of chemical composition, especially the Pb content on the thermoelectric properties of the Ag0.8Pb18+xSbTe20samples, including electrical resistivity, Seebeck coefficient, power factor, thermal conductivity and dimensionless figure of merit. The present study reveals that the optimal composition of Ag0.8Pb18+xSbTe20samples is Ag0.8Pb22.5SbTe20and the maximum figure of merit (ZT) is 1.2 at 673 K.