High-temperature thermoelectric properties of Tix(ZrHf)0.99-xV0.01Ni0.9Pd0.1Sn0.99Sb0.01 half-Heusler alloys

Ping Jen Lee; Shih Chun Tseng; Long Sun Chao

doi:10.1016/j.jallcom.2010.02.131

High-temperature thermoelectric properties of Ti_x(ZrHf)_0.99-xV_0.01Ni_0.9Pd_0.1Sn_0.99Sb_0.01 half-Heusler alloys

Ping Jen Lee, Shih Chun Tseng, Long Sun Chao

Department of Engineering Science

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

10 Citations (Scopus)

Abstract

The effect of Ti substitution at the Zr and Hf site on thermoelectric properties of Ti_x(ZrHf)_0.99-xV_0.01Ni_0.9Pd_0.1Sn_0.99Sb_0.01 half-Heusler alloy compounds was investigated by finding the electrical resistivity, Hall effect, Seebeck coefficient, thermal conductivity and using X-ray diffraction. It was shown that substitution of Ti for Zr and Hf leads to a major reduction in the thermal conductivity and an enhancement of the Seebeck coefficient. The observed maximum Seebeck coefficient, minimum electrical resistivity, and minimum thermal conductivity at about 820 K are -206 μV K^-1, 0.71 mΩ cm, and 5.13 W m^-1 K^-1, respectively. In addition, the dimensionless figure of merit is about 0.92 at about 820 K with a Ti content at x = 0.3.

Original language	English
Pages (from-to)	620-623
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	496
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2010.02.131
Publication status	Published - 2010 Apr 30

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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@article{95305433bc8246f784e3c4e463ed44f1,

title = "High-temperature thermoelectric properties of Tix(ZrHf)0.99-xV0.01Ni0.9Pd0.1Sn0.99Sb0.01 half-Heusler alloys",

abstract = "The effect of Ti substitution at the Zr and Hf site on thermoelectric properties of Tix(ZrHf)0.99-xV0.01Ni0.9Pd0.1Sn0.99Sb0.01 half-Heusler alloy compounds was investigated by finding the electrical resistivity, Hall effect, Seebeck coefficient, thermal conductivity and using X-ray diffraction. It was shown that substitution of Ti for Zr and Hf leads to a major reduction in the thermal conductivity and an enhancement of the Seebeck coefficient. The observed maximum Seebeck coefficient, minimum electrical resistivity, and minimum thermal conductivity at about 820 K are -206 μV K-1, 0.71 mΩ cm, and 5.13 W m-1 K-1, respectively. In addition, the dimensionless figure of merit is about 0.92 at about 820 K with a Ti content at x = 0.3.",

author = "Lee, {Ping Jen} and Tseng, {Shih Chun} and Chao, {Long Sun}",

note = "Funding Information: The work was supported by the National Science Council of Taiwan , Republic of China under contract No. NSC-98-2221-E-006-230. Copyright: Copyright 2010 Elsevier B.V., All rights reserved.",

year = "2010",

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doi = "10.1016/j.jallcom.2010.02.131",

language = "English",

volume = "496",

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AU - Lee, Ping Jen

AU - Tseng, Shih Chun

AU - Chao, Long Sun

N1 - Funding Information: The work was supported by the National Science Council of Taiwan , Republic of China under contract No. NSC-98-2221-E-006-230. Copyright: Copyright 2010 Elsevier B.V., All rights reserved.

PY - 2010/4/30

Y1 - 2010/4/30

N2 - The effect of Ti substitution at the Zr and Hf site on thermoelectric properties of Tix(ZrHf)0.99-xV0.01Ni0.9Pd0.1Sn0.99Sb0.01 half-Heusler alloy compounds was investigated by finding the electrical resistivity, Hall effect, Seebeck coefficient, thermal conductivity and using X-ray diffraction. It was shown that substitution of Ti for Zr and Hf leads to a major reduction in the thermal conductivity and an enhancement of the Seebeck coefficient. The observed maximum Seebeck coefficient, minimum electrical resistivity, and minimum thermal conductivity at about 820 K are -206 μV K-1, 0.71 mΩ cm, and 5.13 W m-1 K-1, respectively. In addition, the dimensionless figure of merit is about 0.92 at about 820 K with a Ti content at x = 0.3.

AB - The effect of Ti substitution at the Zr and Hf site on thermoelectric properties of Tix(ZrHf)0.99-xV0.01Ni0.9Pd0.1Sn0.99Sb0.01 half-Heusler alloy compounds was investigated by finding the electrical resistivity, Hall effect, Seebeck coefficient, thermal conductivity and using X-ray diffraction. It was shown that substitution of Ti for Zr and Hf leads to a major reduction in the thermal conductivity and an enhancement of the Seebeck coefficient. The observed maximum Seebeck coefficient, minimum electrical resistivity, and minimum thermal conductivity at about 820 K are -206 μV K-1, 0.71 mΩ cm, and 5.13 W m-1 K-1, respectively. In addition, the dimensionless figure of merit is about 0.92 at about 820 K with a Ti content at x = 0.3.

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