放电等离子烧结
材料科学
热电效应
塞贝克系数
合金
电阻率和电导率
纳米颗粒
热导率
热电材料
复合材料
烧结
冶金
分析化学(期刊)
纳米技术
热力学
化学
物理
色谱法
电气工程
工程类
作者
De Zhang,Jingdan Lei,Weibao Guan,Zheng Ma,Chao Wang,Lijuan Zhang,Zhenxiang Cheng,Yuanxu Wang
标识
DOI:10.1016/j.jallcom.2019.01.084
摘要
p-type Bi0.46Sb1.54Te3 samples containing nanoprecipitates are prepared by mechanical alloying (MA) and spark plasma sintering (SPS) technique. The thermoelectric performance of Bi0.46Sb1.54Te3 is improved by the energy filtering effect induced by nanoprecipitates, leading to a high ZT value of 1.18 at 325 K. To further improve the thermoelectric performance of Bi0.46Sb1.54Te3, SiC nanoparticles are dispersed into Bi0.46Sb1.54Te3 matrix. The addition of SiC simultaneously increases the electrical conductivity and the Seebeck coefficient. Meanwhile, it also decreases the lattice thermal conductivity from 0.38 to 0.33 Wm−1K−1 for the 0.2 wt% SiC sample. Consequently, a maximum ZT value of 1.45 at 325 K is obtained for Bi0.46Sb1.54Te3 with the addition of 0.2 wt% SiC composites, which increases about 23% than the pristine sample.
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