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Reaction sintering of Ca3Co4O9 with BiCuSeO nanosheets for high-temperature thermoelectric composites
Publikationstyp
Journal Article
Date Issued
2021-12-16
Sprache
English
Author(s)
Hinterding, Richard
Rieks, Desiree
Steinbach, Lukas
Bigall, Nadja C.
Journal
Volume
51
Issue
2
Start Page
532
End Page
542
Citation
Journal of electronic materials 51 (2): 532–542 (2022)
Publisher DOI
Publisher
The Minerals, Metals & Materials Society + Springer Science and Business Media LLC
Ceramic composites composed of oxide materials have been synthesized by reaction sintering of Ca3Co4O9 with BiCuSeO nanosheets. In situ x-ray diffraction and thermogravimetric analyses of the compound powders were conducted to understand the phase transformations during heating up to 1173 K. Further the rmogravimetric analyses investigated the thermal stability of the composites and the completion of reaction sintering. The microstructure of the formed phases after reaction sintering and the composition of the composites were investigated for varying mixtures. Depending on the amount of BiCuSeO used, the phases present and their composition differed, having a significant impact on the thermoelectric properties. The increase of the electrical conductivity at a simultaneously high Seebeck coefficient resulted in a large power factor of 5.4 my W cm−1 K−2, more than twice that of pristine Ca3Co4O9.
DDC Class
621: Applied Physics