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Harizanova, S., Faulques, E., Corraze, B., Payen, C., Zając, M., Wilgocka-Ślęzak, D., Korecki, J., Atanasova, G. & Stoyanova, R. (2021) Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency. Materials, 14 7019. 
Added by: Richard Baschera (2021-12-23 11:07:58)   Last edited by: Richard Baschera (2021-12-23 11:09:50)
Type de référence: Article
DOI: 10.3390/ma14227019
Clé BibTeX: Harizanova2021
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Mots-clés: cobalt-based perovskites, misfit layered oxides, multiphase composites, thermoelectric oxides
Créateurs: Atanasova, Corraze, Faulques, Harizanova, Korecki, Payen, Stoyanova, Wilgocka-Ślęzak, Zając
Collection: Materials
Consultations : 1/486
Indice de consultation : 11%
Indice de popularité : 2.75%
Liens URLs     https://www.mdpi.c ... 96-1944/14/22/7019
The common approach to modify the thermoelectric activity of oxides is based on the concept of selective metal substitution. Herein, we demonstrate an alternative approach based on the formation of multiphase composites, at which the individual components have distinctions in the electric and thermal conductivities. The proof-of-concept includes the formation of multiphase composites between well-defined thermoelectric Co-based oxides: Ni, Fe co-substituted perovskite, LaCo0.8Ni0.1Fe0.1O3 (LCO), and misfit layered Ca3Co4O9. The interfacial chemical and electrical properties of composites are probed with the means of SEM, PEEM/XAS, and XPS tools, as well as the magnetic susceptibility measurements. The thermoelectric power of the multiphase composites is evaluated by the dimensionless figure of merit, ZT, calculated from the independently measured electrical resistivity (ρ), Seebeck coefficient (S), and thermal conductivity (λ). It has been demonstrated that the magnitude’s electric and thermal conductivities depend more significantly on the composite interfaces than the Seebeck coefficient values. As a result, the highest thermoelectric activity is observed at the composite richer on the perovskite (i.e., ZT = 0.34 at 298 K).
Number: 22 Publisher: Multidisciplinary Digital Publishing Institute
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