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Synthesis and Thermoelectric Properties of Ni-Doped ZrCoSb Half-Heusler Compounds

School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
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Metals 2018, 8(1), 61; https://doi.org/10.3390/met8010061
Received: 28 December 2017 / Revised: 11 January 2018 / Accepted: 11 January 2018 / Published: 17 January 2018
(This article belongs to the Special Issue Heusler Compounds)
The Ni-doped ZrCo1−xNixSb half-Heusler compounds were prepared by arc-melting and spark plasma sintering technology. X-ray diffraction analysis results showed that all samples were crystallized in a half-Heusler phase. Thermoelectric properties of ZrCo1−xNixSb compounds were measured from room temperature to 850 K. The electrical conductivity and the absolute value of Seebeck coefficient increased with the Ni-doping content increasing due to the Ni substitution at Co. sites. The lattice thermal conductivity of ZrCo1−xNixSb samples was depressed dramatically because of the acoustic phonon scattering and point defect scattering. The figure of merit of ZrCo1−xNixSb compounds was improved due to the decreased thermal conductivity and improved power factor. The maximum ZT value of 0.24 was achieved for ZrCo0.92Ni0.08Sb sample at 850 K. View Full-Text
Keywords: half-Heusler compound; thermoelectric property; ZrCoSb; Ni-doping half-Heusler compound; thermoelectric property; ZrCoSb; Ni-doping
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Zhao, D.; Wang, L.; Bo, L.; Wu, D. Synthesis and Thermoelectric Properties of Ni-Doped ZrCoSb Half-Heusler Compounds. Metals 2018, 8, 61.

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