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Materials 2018, 11(5), 728; https://doi.org/10.3390/ma11050728

Synthesis and Thermoelectric Properties of Pd-Doped ZrCoBi Half-Heusler Compounds

School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
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Received: 9 April 2018 / Revised: 1 May 2018 / Accepted: 3 May 2018 / Published: 4 May 2018
(This article belongs to the Special Issue Half-Heusler, Silicide and Zintl-type Thermoelectric Materials)
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Abstract

In this study, n-type Pd-doped ZrCo1-xPdxBi (x = 0, 0.03, 0.06, 0.09) half-Heusler samples were prepared by arc-melting and rapid hot-pressing sintering. The thermoelectric properties of ZrCo1-xPdxBi samples were analyzed and discussed. The results showed that the electrical properties of ZrCo1-xPdxBi, including electrical conductivity and the Seebeck coefficient, increase due to the substitution of Pd on Co site. The lattice thermal conductivity of ZrCo1-xPdxBi is markedly decreased because of the Pd/Co substitution. A minimum κL of 5.0 W/mK for ZrCo0.91Pd0.09Bi is achieved at 800 K. The figure of merit of ZrCo1-xPdxBi is boosted due to the depressed lattice thermal conductivity and the improved power factor. The highest value of figure of merit reaches 0.23 for ZrCo0.97Pd0.03Bi half-Heusler compound at 800 K. View Full-Text
Keywords: ZrCoBi; half-Heusler; Pd/Co substitution; thermoelectrics ZrCoBi; half-Heusler; Pd/Co substitution; thermoelectrics
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Zhao, D.; Zuo, M.; Bo, L.; Wang, Y. Synthesis and Thermoelectric Properties of Pd-Doped ZrCoBi Half-Heusler Compounds. Materials 2018, 11, 728.

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