Journal article
High-temperature Thermoelectric Properties of Ca0.9Y0.1Mn1-xFexO3 (0 ≤ x ≤ 0.25)
Department of Energy Conversion and Storage, Technical University of Denmark1
Electrofunctional materials, Department of Energy Conversion and Storage, Technical University of Denmark2
Hanoi University of Science and Technology3
Aarhus University4
Functional organic materials, Department of Energy Conversion and Storage, Technical University of Denmark5
Management, Department of Energy Conversion and Storage, Technical University of Denmark6
Polycrystalline compounds of Ca0.9Y0.1Mn1-x FexO3 for 0 ≤ x ≤ 0.25 were prepared by solid-state reaction, followed by spark plasma sintering process, and their thermoelectric properties from 300 to 1200 K were systematically investigated in terms of Y and Fe co-doping at the Ca- and Mn-sites, respectively.
Crystal structure refinement revealed that all the investigated samples have the O′-type orthorhombic structure, and the lattice parameters slightly increased with increasing Fe concentration, causing a crystal distortion. It was found that with increasing the content of Fe doping, the Seebeck coefficient of Ca0.9Y0.1Mn12xFexO3 tended to increase, while the tendency toward the electrical conductivity was more complicated.
The highest power factor was found to be 2.1 9 10-4 W/mK2 at 1150 K for the sample with x = 0.05 after annealing at 1523 K for 24 h in air. Thermal conductivity of the Fe-doped samples showed a lower value than that of the x = 0 sample, and the highest dimensionless figure of merit, ZT was found to be improved about 20 % for the sample with x = 0.05 as compared to that of the x = 0 sample at 1150 K.
Language: | English |
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Publisher: | Springer US |
Year: | 2013 |
Pages: | 2817-2822 |
Journal subtitle: | Full Set - Includes `journal of Materials Science Letters' |
ISSN: | 15734803 and 00222461 |
Types: | Journal article |
DOI: | 10.1007/s10853-012-6834-z |
ORCIDs: | Le, Thanh Hung , Van Nong, Ngo , Han, Li , Pryds, Nini , Linderoth, Søren and 0000-0002-4632-1024 |
Characterization and Evaluation of Materials Chemistry and Materials Science Continuum Mechanics and Mechanics of Materials Crystallography Material Science Materials Science, general Mechanics Polymer Sciences Seebeck Coefficient Spark Plasma Sinter Thermoelectric Performance Thermoelectric Property Total Thermal Conductivity