Thermoelectrics of n-type with ZT > 1 based on Mg/sub 2/Si-Mg/sub 2/Sn solid solutions

ICT 2005. 24th International Conference on Thermoelectrics, 2005. Pub Date : 2005-06-19 DOI:10.1109/ICT.2005.1519920

V. Zaitsev, M. Fedorov, E. A. Gurieva, I. Eremin, P. Konstantinov, A. Samunin, M. Vedernikov

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引用次数: 8

Abstract

The paper presents the results of extensive experimental and theoretical study of the solid solutions in the system Mg/sub 2/Si-Mg/sub 2/Sn. It is shown that the system is a favorable base for the creation of excellent thermoelectrics with band type of conductivity. The reproducible results are obtained for Seebeck and Hall coefficients, electrical and thermal conductivity in the wide temperature range 77-850 K for the samples of various solid solution composition and various electron concentration (up to 5/spl middot/10/sup 20/ cm/sup -3/). At optimum solid solution composition and electron concentration the thermoelectric of ZT/sub max/=1.1 is produced reliably. Average ZT value in the temperature range 350-830 K is about 0.8 for this material. It is shown that the high value of ZT is achieved due to some features of band structure of these materials. It is of great interest that these thermoelectrically remarkable alloys have simple crystallographic structure, made by a traditional technology and are formed from very cheap and ecologically friendly components.

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基于Mg/sub - 2/Si-Mg/sub - 2/Sn固溶体的ZT > 1 n型热电材料

本文介绍了对Mg/sub - 2/Si-Mg/sub - 2/Sn体系中固溶体进行广泛实验和理论研究的结果。结果表明，该体系是制备具有带状导电性的优良热电材料的良好基础。在77 ~ 850 K的宽温度范围内，对于不同固溶体组成和不同电子浓度(高达5/spl middot/10/sup 20/ cm/sup -3/)的样品，获得了塞贝克系数和霍尔系数、电导率和导热系数的可重复性结果。在最佳固溶体组成和电子浓度下，可以可靠地产生ZT/sub max/=1.1的热电性。该材料在350- 830k温度范围内的平均ZT值约为0.8。结果表明，高ZT值是由于这些材料的能带结构的一些特点。令人感兴趣的是，这些热电性能优异的合金具有简单的晶体结构，由传统技术制成，由非常便宜和生态友好的成分组成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ICT 2005. 24th International Conference on Thermoelectrics, 2005.

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