Fabrication and property of high-performance Ag-Pb-Sb-Te system semiconducting thermoelectric materials

被引:0
|
作者
ZHOU Min
机构
基金
中国国家自然科学基金;
关键词
thermoelectric materials; mechanical alloying; spark plasma sintering; thermoelectric performance;
D O I
暂无
中图分类号
TN304 [材料];
学科分类号
0805 ; 080501 ; 080502 ; 080903 ;
摘要
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 micros-copy (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+xSbTe20 samples, 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+xSbTe20 samples is Ag0.8Pb22.5SbTe20 and the maximum figure of merit (ZT) is 1.2 at 673 K.
引用
收藏
页码:990 / 996
页数:7
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