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Thermal and Electronic Transport Properties of the Half-Heusler Phase ScNiSb

Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, 50-950 Wrocław, Poland
Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
Author to whom correspondence should be addressed.
Materials 2019, 12(10), 1723;
Received: 13 May 2019 / Revised: 24 May 2019 / Accepted: 24 May 2019 / Published: 27 May 2019
(This article belongs to the Special Issue Heusler and Half-Heusler Compounds)
Thermoelectric properties of the half-Heusler phase ScNiSb (space group F 4 ¯ 3m) were studied on a polycrystalline single-phase sample obtained by arc-melting and spark-plasma-sintering techniques. Measurements of the thermopower, electrical resistivity, and thermal conductivity were performed in the wide temperature range 2–950 K. The material appeared as a p-type conductor, with a fairly large, positive Seebeck coefficient of about 240 μV K−1 near 450 K. Nevertheless, the measured electrical resistivity values were relatively high (83 μΩm at 350 K), resulting in a rather small magnitude of the power factor (less than 1 × 10−3 W m−1 K−2) in the temperature range examined. Furthermore, the thermal conductivity was high, with a local minimum of about 6 W m−1 K−1 occurring near 600 K. As a result, the dimensionless thermoelectric figure of merit showed a maximum of 0.1 at 810 K. This work suggests that ScNiSb could be a promising base compound for obtaining thermoelectric materials for energy conversion at high temperatures. View Full-Text
Keywords: Heusler alloys; thermoelectric; ScNiSb Heusler alloys; thermoelectric; ScNiSb
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MDPI and ACS Style

Synoradzki, K.; Ciesielski, K.; Veremchuk, I.; Borrmann, H.; Skokowski, P.; Szymański, D.; Grin, Y.; Kaczorowski, D. Thermal and Electronic Transport Properties of the Half-Heusler Phase ScNiSb. Materials 2019, 12, 1723.

AMA Style

Synoradzki K, Ciesielski K, Veremchuk I, Borrmann H, Skokowski P, Szymański D, Grin Y, Kaczorowski D. Thermal and Electronic Transport Properties of the Half-Heusler Phase ScNiSb. Materials. 2019; 12(10):1723.

Chicago/Turabian Style

Synoradzki, Karol, Kamil Ciesielski, Igor Veremchuk, Horst Borrmann, Przemysław Skokowski, Damian Szymański, Yuri Grin, and Dariusz Kaczorowski. 2019. "Thermal and Electronic Transport Properties of the Half-Heusler Phase ScNiSb" Materials 12, no. 10: 1723.

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