Thermoelectric performance of Sb-doped Mg2-xZnxSi(0≤x≤0.1) solid solutions

被引：0

作者：

Du Z. ^{[1
]}

Cui J. ^{[1
]}

机构：

[1] College of Materials Science and Engineering, Ningbo University of Technology, Ningbo

来源：

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2016年 / 45卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Isoelectronic substitution; Magnesium silicides; Thermoelectric materials; Thermoelectric property;

D O I：

10.1016/s1875-5372(16)30094-7

中图分类号：

学科分类号：

摘要：

Mg2-xZnxSi0.99Sb0.01 (0≤x≤0.1) solid solutions were prepared by a B2O3 flux method combined with a spark plasma sintering (SPS) technique. The electrical conductivity, Seebeck coefficient and thermal conductivity were measured as a function of temperature from 300 K to 780 K. It is found that the lattice thermal conductivity reduces with Zn content increasing; however, the electrical conductivity first decreases and then increases. The underlying mechanism was discussed. Results show that among the samples, the maximum PF (power factor) of 1.76 mW·m-1·K-2 at x=0.075 is obtained at 780 K, about 18% higher than that of Mg2Si0.99Sb0.01. The lowest lattice thermal conductivity of 2.86 W·m-1·K-1 is obtained at 770 K for the x=0.1 sample. As a result, a maximum dimensionless figure of merit of 0.37 is obtained for Mg1.9Zn0.1Si0.99Sb0.01 at 780 K. Copyright © 2016, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.

引用

页码：889 / 892

页数：3

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