Constitution of the binary M-Sb systems (M = Ti, Zr, Hf) and physical properties of MSb<sub>2</sub>

Author(s)
Ali Tavassoli, Andrij Grytsiv, Fainan Failamani, Gerda Rogl, Stephan Puchegger, Helmut Müller, Pavel Broz, František Zelenka, Daniele Maccio, Adriana Saccone, Gerald Giester, E. Bauer, Michael Zehetbauer, Peter Franz Rogl
Abstract

This study is closely related to the chemical interactions in thermoelectric joints of a hot metal electrode with pand n-type skutterudite. As a result of this work, a first and complete phase diagram has been constructed for the TieSb system as well as partial phase diagrams (> 65 at.% Sb) for the systems ZreSb and HfeSb. Investigations are based on X-ray powder and single crystal analyses (determination of the crystal structure of Ti5Sb8 with Zr2.6Ti2.4Sb8-type, space group I4122; RF = 0.032), electron probe microanalyses (EPMA) and differential thermal analyses (DTA). Physical properties were evaluated for the binary compounds MSb2 (M = Ti, Zr, Hf) comprising electrical resistivity (from 4.2 K to 825 K), specific heat, thermal conductivity and thermal expansion coefficient (from 4.2 K to 300 K), Seebeck coefficient (from 300 K to 825 K) and elastic moduli at 300 K. These data will serve to evaluate the potential of MSb2 compounds (M = Ti, Zr, Hf) for thermoelectric devices, where these phases predominantly appear in the diffusion zones of the hot metal electrode with p- and n-type skutterudite.

Organisation(s)
Department of Materials Chemistry, Faculty Center for Nano Structure Research, Department of Mineralogy and Crystallography, Physics of Nanostructured Materials
External organisation(s)
Christian Doppler Laboratory for Thermoelectricity, Masaryk University, Technische Universität Wien, Università degli Studi di Genova
Journal
Intermetallics
Volume
94
Pages
119-132
No. of pages
14
ISSN
0966-9795
DOI
https://doi.org/10.1016/j.intermet.2017.12.014
Publication date
03-2018
Peer reviewed
Yes
Austrian Fields of Science 2012
Materials chemistry, Physical chemistry, Crystallography, Inorganic chemistry
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/constitution-of-the-binary-msb-systems-m--ti-zr-hf-and-physical-properties-of-msb2(680b24f7-b66f-45b8-bda8-fb1359dbd9e7).html