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

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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 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.

Original languageEnglish
Pages (from-to)4165-4167
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number25
DOIs
Publication statusPublished - 2001 Dec 17

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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