材料科学与工程学报2012，Vol.30Issue(5)：694-697,4.
熔体缓冷制备Pb9.6SbmTe3Se7合金及其热电性能
Melt-slow Cooling Synthesis and Thermoelectric Properties of Pb9.6SbmTe3Se7 Alloys
时睿智 1陈怡 1张昀 1朱铁军 1赵新兵1
作者信息
- 1. 浙江大学材料系硅材料国家重点实验室,浙江杭州310027
- 折叠
摘要
Abstract
Pb9.6SbmTe3Se7 alloys(m=0.15,0.2,0.25,0.267,0.3,0.35,0.4) have been synthesized by slow cooling followed smelting in evacuated tubes and powder hot pressing,and the effect of Sb doping on the thermoelectric performance was investigated.As the Sb content increases,except for the alloy of m=0.4,carrier mobility decreases,electrical conductivity decreases,and thermal conductivity shows a decreasing trend,significantly lower than the thermal conductivity of PbTe.HRTEM images suggest the Pb9.6Sb0.3Te3Se7 phases are inhomogeneous with widely distributed nanosized islands with different shapes,which are favorable to the strong suppression of the lattice thermal conductivity.Finally,the thermoelectric properties of the materials have been improved by Sb doping.It is noteworthy that Pb9.6Sb0.3Te3Se7 exhibits a high thermoelectric figure of merit,with the highest ZT ~1.14 at 673 K,which is about 50% higher than that of the state-of-the-art n-type PbTe reported previously.关键词
PbTe/Sb掺杂/真空熔炼缓冷/热电性能Key words
PbTe/Sb doping/vacuum smelting and slow cooling/thermoelectric properties分类
信息技术与安全科学引用本文复制引用
时睿智,陈怡,张昀,朱铁军,赵新兵..熔体缓冷制备Pb9.6SbmTe3Se7合金及其热电性能[J].材料科学与工程学报,2012,30(5):694-697,4.
