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Issue 37, 2019
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Study of thermal stability of p-type skutterudites DD0.7Fe3CoSb12 by Knudsen effusion mass spectrometry

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Abstract

The temperature and phase stability of p-type skutterudites, DD0.7Fe3CoSb12, manufactured via various preparation techniques, all exhibiting a high ZT-level, have been studied by means of thermal analysis and Knudsen effusion mass spectrometry. The results from phase transformation measurements and characteristics of the evaporation of antimony, as the volatile element, supported by microstructure observations and by diffusion profiles are summarized and discussed in view of a full understanding of the degradation processes and knowledge of the long term operation stability of the bulk and nano-structured thermoelectrics studied. It was found out that the antimony evaporation is a complex diffusion kinetic process resulting in a stable Sb level dependent on the preparation route. The studied p-type skutterudites, DD0.7Fe3CoSb12, have proven their long term stability in thermoelectric devices at a maximum operation temperature of 600 °C. Complementary data on the structural, physical and mechanical properties of the materials are presented as well.

Graphical abstract: Study of thermal stability of p-type skutterudites DD0.7Fe3CoSb12 by Knudsen effusion mass spectrometry

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Publication details

The article was received on 29 May 2019, accepted on 01 Jul 2019 and first published on 09 Jul 2019


Article type: Paper
DOI: 10.1039/C9RA04056K
RSC Adv., 2019,9, 21451-21459
  • Open access: Creative Commons BY-NC license
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    Study of thermal stability of p-type skutterudites DD0.7Fe3CoSb12 by Knudsen effusion mass spectrometry

    F. Zelenka, P. Brož, J. Vřešťál, J. Buršík, G. Rogl, A. Grytsiv and P. Rogl, RSC Adv., 2019, 9, 21451
    DOI: 10.1039/C9RA04056K

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