Influence of Sb doping on thermoelectric properties of Mg2Ge materials

H. L. Gao; T. J. Zhu; X. B. Zhao; Y. Deng

doi:10.1016/j.intermet.2014.08.010

Influence of Sb doping on thermoelectric properties of Mg₂Ge materials

H. L. Gao
, T. J. Zhu
, X. B. Zhao^*
, Y. Deng

^*Corresponding author for this work

School of Materials Science and Engineering

Zhejiang University
Beihang University

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

The Sb-doped Mg₂Ge compounds were successfully synthesized by tantalum-tube weld melting method followed by hot pressing and the thermoelectric properties were examined. The effects of Sb doping on the electrical conductivity, Seebeck coefficient, and thermal conductivity have been investigated in the temperature range of 300-740 K. It was found that the Sb doping with sufficient Mg excess increased the electrical conductivity dramatically, leading to enhancement of the power factors. The thermal conductivity was also reduced upon Sb doping, mainly due to mass fluctuation scattering and strain field effects. Mg_2.2Ge_0.095Sb_0.005 showed a maximum thermoelectric figure of merit of ≈0.2 at 740 K.

Original language	English
Pages (from-to)	33-36
Number of pages	4
Journal	Intermetallics
Volume	56
DOIs	https://doi.org/10.1016/j.intermet.2014.08.010
State	Published - Jan 2015

Keywords

A. Intermetallics
B. Thermoelectric properties
G. Thermoelectric power generation

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10.1016/j.intermet.2014.08.010

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title = "Influence of Sb doping on thermoelectric properties of Mg2Ge materials",

abstract = "The Sb-doped Mg2Ge compounds were successfully synthesized by tantalum-tube weld melting method followed by hot pressing and the thermoelectric properties were examined. The effects of Sb doping on the electrical conductivity, Seebeck coefficient, and thermal conductivity have been investigated in the temperature range of 300-740 K. It was found that the Sb doping with sufficient Mg excess increased the electrical conductivity dramatically, leading to enhancement of the power factors. The thermal conductivity was also reduced upon Sb doping, mainly due to mass fluctuation scattering and strain field effects. Mg2.2Ge0.095Sb0.005 showed a maximum thermoelectric figure of merit of ≈0.2 at 740 K.",

keywords = "A. Intermetallics, B. Thermoelectric properties, G. Thermoelectric power generation",

author = "Gao, \{H. L.\} and Zhu, \{T. J.\} and Zhao, \{X. B.\} and Y. Deng",

year = "2015",

month = jan,

doi = "10.1016/j.intermet.2014.08.010",

language = "英语",

volume = "56",

pages = "33--36",

journal = "Intermetallics",

issn = "0966-9795",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Influence of Sb doping on thermoelectric properties of Mg2Ge materials

AU - Gao, H. L.

AU - Zhu, T. J.

AU - Zhao, X. B.

AU - Deng, Y.

PY - 2015/1

Y1 - 2015/1

N2 - The Sb-doped Mg2Ge compounds were successfully synthesized by tantalum-tube weld melting method followed by hot pressing and the thermoelectric properties were examined. The effects of Sb doping on the electrical conductivity, Seebeck coefficient, and thermal conductivity have been investigated in the temperature range of 300-740 K. It was found that the Sb doping with sufficient Mg excess increased the electrical conductivity dramatically, leading to enhancement of the power factors. The thermal conductivity was also reduced upon Sb doping, mainly due to mass fluctuation scattering and strain field effects. Mg2.2Ge0.095Sb0.005 showed a maximum thermoelectric figure of merit of ≈0.2 at 740 K.

AB - The Sb-doped Mg2Ge compounds were successfully synthesized by tantalum-tube weld melting method followed by hot pressing and the thermoelectric properties were examined. The effects of Sb doping on the electrical conductivity, Seebeck coefficient, and thermal conductivity have been investigated in the temperature range of 300-740 K. It was found that the Sb doping with sufficient Mg excess increased the electrical conductivity dramatically, leading to enhancement of the power factors. The thermal conductivity was also reduced upon Sb doping, mainly due to mass fluctuation scattering and strain field effects. Mg2.2Ge0.095Sb0.005 showed a maximum thermoelectric figure of merit of ≈0.2 at 740 K.

KW - A. Intermetallics

KW - B. Thermoelectric properties

KW - G. Thermoelectric power generation

UR - https://www.scopus.com/pages/publications/84907525762

U2 - 10.1016/j.intermet.2014.08.010

DO - 10.1016/j.intermet.2014.08.010

M3 - 文章

AN - SCOPUS:84907525762

SN - 0966-9795

VL - 56

SP - 33

EP - 36

JO - Intermetallics

JF - Intermetallics

ER -

Influence of Sb doping on thermoelectric properties of Mg₂Ge materials

Abstract

Keywords

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