Improvement of Thermoelectric properties of Lanthanum cobaltate by Sr and Mn co-substitution

Abstract

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 (σ). Thermal conductivity (\k{appa}) of all the samples increases with the increase in temperature but decreases with the substitution in LaCoO3. An estimation of the electronic thermal conductivity (\k{appa}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

arXiv comment19 pages, 6 figures, 3 tables

References in corpus (2)

• La0.95Sr0.05CoO3: An efficient room-temperature thermoelectric oxide
• Thermal Conductivity, Thermopower, and Figure of Merit of La_{1-x}Sr_xCoO_3

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• Thermoelectric properties of high-entropy wolframite oxide: (CoCuNiFeZn)${}_{1-x}$Ga${}_x$WO${}_4$
• Electrical and Thermal transport studies of Sr and Mn co-substituted NdCoO3