Effect of Multiple Metal Substitutions for A- and B-perovskite Sites on the Thermoelectric Properties of LaCoO3

Authors(6) :-S. Harizanova, E. Zhecheva, V. Valchev, P. Markov, M. Khristov, R. Stoyanova

The present contribution provides new data on the effect of multiple metal substitutions for A- and B-perovskite sites on the thermoelectric properties of LaCoO3-based ceramics. Two groups of perovskite comopositions are studied: double substituted cobaltates with general formula LaCo0.8M0.1M0.1O3 (M0.1M0.1 º Ni0.1Fe0.1, Ni0.1Ti0.1, Mn0.1Fe0.1) and Sr-containing cobaltate with La0.9Sr0.1Co0.8Ni0.1Fe0.1O3. The content of all magnetic (Ni, Fe and Mn) and diamagnetic (Ti and Sr) elements are chosen to be 0.10 mol. Structural and morphological characterizations are carried out by powder XRD, SEM and TEM analyses. The thermoelectric efficiency of the perovskites is determined by the dimensionless figure of merit, calculated from the independently measured Seebeck coefficient, electrical resistivity and thermal conductivity. The effectiveness of the multiple metal substitutions for improvement of the thermoelectric properties of LaCoO3-based ceramics is discussed.

Authors and Affiliations

S. Harizanova
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
E. Zhecheva
Faculty of Physics, University of Sofia, 1164 Sofia, Bulgaria
V. Valchev
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
P. Markov
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
M. Khristov
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
R. Stoyanova

Cobalt-Based Perovskites; Thermoelectric Oxides.

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Publication Details

Published in : Volume 2 | Issue 6 | November-December 2016
Date of Publication : 2016-12-30
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 428-439
Manuscript Number : IJSRST162682
Publisher : Technoscience Academy

Print ISSN : 2395-6011, Online ISSN : 2395-602X

Cite This Article :

S. Harizanova, E. Zhecheva, V. Valchev, P. Markov, M. Khristov, R. Stoyanova, " Effect of Multiple Metal Substitutions for A- and B-perovskite Sites on the Thermoelectric Properties of LaCoO3, International Journal of Scientific Research in Science and Technology(IJSRST), Print ISSN : 2395-6011, Online ISSN : 2395-602X, Volume 2, Issue 6 , pp.428-439, November-December-2016. Available at doi : 10.32628/IJSRST162682
Journal URL : http://ijsrst.com/IJSRST162682

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