High-temperature thermoelectric properties of Ti0.5(ZrHf) 0.5-xNbxNi0.9Pd0.1Sn 0.98Sb0.02 half-Heusler alloys

Ping Jen Lee; Long Sun Chao

doi:10.1016/j.jallcom.2010.05.086

High-temperature thermoelectric properties of Ti_0.5(ZrHf) _0.5-xNb_xNi_0.9Pd_0.1Sn _0.98Sb_0.02 half-Heusler alloys

Ping Jen Lee, Long Sun Chao

Department of Engineering Science

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

15 Citations (Scopus)

Abstract

The effects of Nb substitution at the IV metal site on the thermoelectric properties of Ti_0.5(ZrHf)_0.5-xNb_xNi _0.9Pd_0.1Sn_0.98Sb_0.02 half-Heusler alloy compounds were investigated by measuring the electrical resistivity, Hall effect, Seebeck coefficient and thermal conductivity. Changes in its microstructure were characterized using SEM and X-ray diffraction. It was shown that the substitution of Nb for TiNiSn-based alloys led to a significant reduction in the thermal conductivity due to the increase in defects and an enhancement of the electrical conductivity. The best sample reached a ZT of 0.66 at 900 K with an Nb content of x = 0.01.

Original language	English
Pages (from-to)	192-196
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	504
Issue number	1
DOIs	https://doi.org/10.1016/j.jallcom.2010.05.086
Publication status	Published - 2010 Aug 31

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2010.05.086

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title = "High-temperature thermoelectric properties of Ti0.5(ZrHf) 0.5-xNbxNi0.9Pd0.1Sn 0.98Sb0.02 half-Heusler alloys",

abstract = "The effects of Nb substitution at the IV metal site on the thermoelectric properties of Ti0.5(ZrHf)0.5-xNbxNi 0.9Pd0.1Sn0.98Sb0.02 half-Heusler alloy compounds were investigated by measuring the electrical resistivity, Hall effect, Seebeck coefficient and thermal conductivity. Changes in its microstructure were characterized using SEM and X-ray diffraction. It was shown that the substitution of Nb for TiNiSn-based alloys led to a significant reduction in the thermal conductivity due to the increase in defects and an enhancement of the electrical conductivity. The best sample reached a ZT of 0.66 at 900 K with an Nb content of x = 0.01.",

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T1 - High-temperature thermoelectric properties of Ti0.5(ZrHf) 0.5-xNbxNi0.9Pd0.1Sn 0.98Sb0.02 half-Heusler alloys

AU - Lee, Ping Jen

AU - Chao, Long Sun

PY - 2010/8/31

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AB - The effects of Nb substitution at the IV metal site on the thermoelectric properties of Ti0.5(ZrHf)0.5-xNbxNi 0.9Pd0.1Sn0.98Sb0.02 half-Heusler alloy compounds were investigated by measuring the electrical resistivity, Hall effect, Seebeck coefficient and thermal conductivity. Changes in its microstructure were characterized using SEM and X-ray diffraction. It was shown that the substitution of Nb for TiNiSn-based alloys led to a significant reduction in the thermal conductivity due to the increase in defects and an enhancement of the electrical conductivity. The best sample reached a ZT of 0.66 at 900 K with an Nb content of x = 0.01.

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