Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 735, Issue -, Pages 1787-1791Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.11.334
Keywords
Powders: solid-state reaction; Thermal conductivity; Electrical conductivity; Perovskites
Categories
Funding
- Ministry of Human Resources and Development (MHRD), Government of India
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We report thermoelectric (TE) properties of Sr and Mn co-substituted LaCoO3 system from room temperature to 700 K. Sr-substitutions at La and Mn at Co site in LaCoO3 improves the electrical conductivity (sigma). Thermal conductivity (kappa) of all the samples increases with the increase in temperature but decreases with the substitution in LaCoO3. An estimation of the electronic thermal conductivity (kappa(e)) suggests a dominant phonon contribution to thermal conductivity in this system. A maximum value of the figure of merit is 0.14 at 480 K for La0.95Sr0.05Co0.95Mn0.05O3. (C) 2017 Elsevier B.V. All rights reserved.
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