Synthesis and characterization of Sr2TiMO6 (M = Fe,Co) double perovskites for high temperature thermoelectric applications

Abstract

ABSTRACTThe prospects of double perovskites based materials as the candidate for high temperature thermoelectric materials were investigated. Among the various complex perovskites, SrTiO3 based oxides had shown great potential for thermoelectric applications. In the current investigation, Sr2TiMO6 (M = Fe, Co) based double perovskites were synthesized using conventional solid-state route. The oxide samples were then investigated for their crystal structure (single phase) and morphology by XRD and SEM, respectively. Thermopower or Seebeck coefficient (S) and electrical conductivity (σ) of these oxide samples were measured simultaneously in the temperature range from 300 K to 1125 K. Large thermopower was obtained for these oxides in the wide range of temperature. Furthermore, thermoelectric power factor (S²σ) of these oxides were calculated to explore their potential for use in the high temperature thermoelectric devices.