Details
| Original language | English |
|---|---|
| Pages (from-to) | 532-542 |
| Number of pages | 11 |
| Journal | Journal of electronic materials |
| Volume | 51 |
| Issue number | 2 |
| Early online date | 16 Dec 2021 |
| Publication status | Published - Feb 2022 |
Abstract
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 thermogravimetric 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 μW cm−1 K−2, more than twice that of pristine Ca3Co4O9.
Keywords
- BiCuSeO, CaCoO, composites, oxides, Thermoelectrics
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Materials Chemistry
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In: Journal of electronic materials, Vol. 51, No. 2, 02.2022, p. 532-542.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Reaction Sintering of Ca3Co4O9 with BiCuSeO Nanosheets for High-Temperature Thermoelectric Composites
AU - Hinterding, Richard
AU - Rieks, Desiree
AU - Kißling, Patrick A.
AU - Steinbach, Lukas
AU - Bigall, Nadja C.
AU - Feldhoff, Armin
N1 - Funding Information: The authors gratefully appreciate access to the JSM-6700FPLus by Dr. Renat Almeev and technical assistance by Frank Steinbach. The study was partly funded by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) projects FE 928/21-1 and BI 1708/5-1. In addition, the project leading to these results has in part received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement no. 714429).
PY - 2022/2
Y1 - 2022/2
N2 - 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 thermogravimetric 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 μW cm−1 K−2, more than twice that of pristine Ca3Co4O9.
AB - 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 thermogravimetric 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 μW cm−1 K−2, more than twice that of pristine Ca3Co4O9.
KW - BiCuSeO
KW - CaCoO
KW - composites
KW - oxides
KW - Thermoelectrics
UR - http://www.scopus.com/inward/record.url?scp=85121346689&partnerID=8YFLogxK
U2 - 10.1007/s11664-021-09336-2
DO - 10.1007/s11664-021-09336-2
M3 - Article
AN - SCOPUS:85121346689
VL - 51
SP - 532
EP - 542
JO - Journal of electronic materials
JF - Journal of electronic materials
SN - 0361-5235
IS - 2
ER -