Effects of partial substitution of Ni by Pd on the thermoelectric properties of ZrNiSn-based half-Heusler compounds

Q. Shen; L. Chen; T. Goto; T. Hirai; J. Yang; G. P. Meisner; C. Uher

doi:10.1063/1.1425459

Effects of partial substitution of Ni by Pd on the thermoelectric properties of ZrNiSn-based half-Heusler compounds

Q. Shen, L. Chen, T. Goto, T. Hirai, J. Yang, G. P. Meisner, C. Uher

Materials Processing and Characterization Division

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

314 Citations (Scopus)

Abstract

We report on the effects of partial substitution of nickel by palladium on the thermoelectric properties of ZrNiSn-based half-Heusler compounds. It is shown that the substitution of palladium for nickel results in a significant, beneficial reduction of the thermal conductivity. The Seebeck coefficient also decreases, but only by a small amount. In the Hf_0.5Zr_0.5Ni_0.8Pd_0.2Sn _0.99Sb_0.01 compound, a power factor of 22.1 μW K^-2 cm^-1 and a thermal conductivity as low as 4.5 W/m K are measured at room temperature. The dimensionless figure of merit ZT increases with increasing temperature and reaches a maximum value of 0.7 at about 800 K.

Original language	English
Pages (from-to)	4165-4167
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	25
DOIs	https://doi.org/10.1063/1.1425459
Publication status	Published - 2001 Dec 17

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "We report on the effects of partial substitution of nickel by palladium on the thermoelectric properties of ZrNiSn-based half-Heusler compounds. It is shown that the substitution of palladium for nickel results in a significant, beneficial reduction of the thermal conductivity. The Seebeck coefficient also decreases, but only by a small amount. In the Hf0.5Zr0.5Ni0.8Pd0.2Sn 0.99Sb0.01 compound, a power factor of 22.1 μW K-2 cm-1 and a thermal conductivity as low as 4.5 W/m K are measured at room temperature. The dimensionless figure of merit ZT increases with increasing temperature and reaches a maximum value of 0.7 at about 800 K.",

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AU - Chen, L.

AU - Goto, T.

AU - Hirai, T.

AU - Yang, J.

AU - Meisner, G. P.

AU - Uher, C.

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AB - We report on the effects of partial substitution of nickel by palladium on the thermoelectric properties of ZrNiSn-based half-Heusler compounds. It is shown that the substitution of palladium for nickel results in a significant, beneficial reduction of the thermal conductivity. The Seebeck coefficient also decreases, but only by a small amount. In the Hf0.5Zr0.5Ni0.8Pd0.2Sn 0.99Sb0.01 compound, a power factor of 22.1 μW K-2 cm-1 and a thermal conductivity as low as 4.5 W/m K are measured at room temperature. The dimensionless figure of merit ZT increases with increasing temperature and reaches a maximum value of 0.7 at about 800 K.

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Effects of partial substitution of Ni by Pd on the thermoelectric properties of ZrNiSn-based half-Heusler compounds

Abstract

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