Titel
Study of thermal stability of p-type skutterudites DD0.7Fe3CoSb12 by Knudsen effusion mass spectrometry
Autor*in
František Zelenka
Department of Chemistry, Faculty of Science, Masaryk University
Jan Vřešťál
Department of Chemistry, Faculty of Science, Masaryk University
... show all
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.
Stichwort
General ChemistryGeneral Chemical Engineering
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
RSC Advances
Band
9
Ausgabe
37
ISSN
2046-2069
Erscheinungsdatum
2019
Seitenanfang
21451
Seitenende
21459
Publication
Royal Society of Chemistry (RSC)
Projekt
Kod / Identifikator
2019-CZ/01
Fördergeber
Projekt
Kod / Identifikator
GA 17-12844S
Fördergeber
Projekt
Kod / Identifikator
CEITEC 2020 (LQ1601)
Erscheinungsdatum
2019
Zugänglichkeit
Rechte
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