Thermoelectric Properties of Novel Skutterudites with Didymium: DDy (Fe1-xCox) 4Sb12 and DDy (Fe1-xNix) 4Sb12
- Author(s)
- Gerda Rogl, Andrij Grytsiv, Ernst Bauer, Peter Franz Rogl, Michael Zehetbauer
- Abstract
In order to improve the thermoelectric properties via efficient phonon scattering Didymium (DD), a mixture of Pr and Nd, was used as a new filler in ternary skutterudites (Fe1-xCox)4Sb12 and (Fe1-xNix)4Sb12. DD-filling levels have been determined from combined data of X-ray powder diffraction and electron microprobe analyses (EMPA). Thermoelectric properties have been characterized by measurements of electrical resistivity, thermopower and thermal conductivity in the temperature range from 4.3 to 800 K. The effect of nanostructuring in DD0.4Fe2Co2Sb12 was elucidated from a comparison of both micro-powder (ground in a WC-mortar, 10 µm) and nano-powder (ball-milled, 150 nm), both hot pressed under identical conditions. The figure of merit ZT depends on the Fe/Co and Ni/Co-contents, respectively, reaching ZT > 1. At low temperatures the nanostructured material exhibits a higher thermoelectric figure of merit. The Vickers hardness was measured for all samples being higher for the nanostructured material.
- Organisation(s)
- Department of Physical Chemistry, Physics of Nanostructured Materials
- External organisation(s)
- Technische Universität Wien
- Journal
- Intermetallics
- Volume
- 18
- Pages
- 57-64
- No. of pages
- 8
- ISSN
- 0966-9795
- DOI
- https://doi.org/10.1016/j.intermet.2009.06.005
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103023 Polymer physics, 210006 Nanotechnology, 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/thermoelectric-properties-of-novel-skutterudites-with-didymium-ddy-fe1xcox-4sb12-and-ddy-fe1xnix-4sb12(1118cbaa-64d8-4c7a-880f-5a6bec75b646).html