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Thermal stability and oxidation resistance of BiCuSeO based thermoelectric ceramics.
- Source :
-
Journal of Alloys & Compounds . Nov2014, Vol. 614, p394-400. 7p. - Publication Year :
- 2014
-
Abstract
- BiCuSeO-based oxyselenide compounds show promising thermoelectric properties, but its thermal stability and oxidation behavior are unknown, which were investigated in the present work with a PbTe-based thermoelectric alloy as a comparison. It was revealed that the BiCuSeO polycrystalline materials displayed much better thermal stability in air than the PbTe-based alloys that were severely oxidized at 573 K, resulting in a decreased density and significantly reduced electrical conductivity. Nevertheless, it was found that the BiCuSeO-based thermoelectric materials could not be used in air for a long time as a conventional oxide at high temperatures; apparent decomposition occurred in the BiCuSeO samples when heated at 773 K, although at 573 K the oxidation was limited to the surface accompanied by the formation of bismuth oxide. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 614
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 97390849
- Full Text :
- https://doi.org/10.1016/j.jallcom.2014.06.117