Interpretation of thermoelectric properties of Cu substituted LaCoO3 ceramics

Abstract

Articles you may be interested inCu-substitution effect on thermoelectric properties of the TiNi-based shape memory alloys Abstract. The thermoelectric properties of LaCo 1-x Cu x O 3-δ is theoretically analyzed, it is observed that thermoelectric figure of merit ZT (=S 2 σT/κ) is maximized by Cu substitution in LaCoO 3 Ceramics at x=0.15. The lattice thermal conductivity and thermoelectric power were estimated by the scattering of phonons with defects, grain boundaries, electrons and phonons to evaluate the thermoelectric properties. We found that Cu substitution increase the phonon scattering with grain boundaries and defects which significantly increase the thermoelectric power and decrease the thermal conductivity. The present numerical analysis will help in designing more efficient thermoelectric materials.