Manuscript Number : IJSRST162682
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 LaCo0.8M0.1M’0.1O3 (M0.1M’0.1 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.
S. Harizanova Cobalt-Based Perovskites; Thermoelectric Oxides. Publication Details
Published in : Volume 2 | Issue 6
| November-December 2016 Article Preview
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
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
Journal URL : https://ijsrst.com/IJSRST162682
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