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Solid State Reaction Synthesis and Thermoelectric Properties of Ag-Doped Mg2Si0.8Ge0.2

Journal Key Engineering Materials (Volume 313)
Volume Composite Materials IV
Edited by Chi Y.A. Tsao and Jing Kun Guo
Pages 177-182
DOI 10.4028/www.scientific.net/KEM.313.177
Citation Qiong Zhen Liu et al., 2006, Key Engineering Materials, 313, 177
Online since July, 2006
Authors Qiong Zhen Liu, Lian Meng Zhang, Qiang Shen, Hong Yi Jiang, Chuan Bin Wang
Keywords Mg2Si0.8Ge0.2, Solid State Reaction, Thermoelectric Property
Abstract

By two-step solid state reaction, Mg2Si0.8Ge0.2 was successfully synthesized .The effect of Ag-doping concentration on the thermoelectric transport properties of p-type Mg2Si0.8Ge0.2 was investigated. With the increasing of Ag-doping concentration, the electrical conductivity σ and Seebeck coefficient α increase correspondingly over the measuring temperature range (300-800K).The peaks of the curves of Seebeck coefficient versus temperature shift towards the lower temperature .When the doping concentration of Ag is 16000ppm(nominal molar percent), the power factor P of Mg2Si0.8Ge0.2 reaches 4.4×10-4W/mK2 at 800K,obviously improved in comparison with the sample with no additive .

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