AP0831 Synthesis and Characterization of Perovskite Nanoparticles of Sr2.5Tb0.5CoFeO7, Sr2.5Tb0.5CoCuO7

Abstract

In this study, nanoparticles of Sr_2.5Tb₀.₅CoFeO₇ and Sr₂.₅Tb₀.₅CoCuO₇, which perovskite derivatives belonging to the Ruddlesden–Popper series were synthesized by modify Sr₃+Co₂O₇ (which belong to A_n+1B_nO_3n+1 type) throw partial replacement of cobalt (Co) with copper (Cu) or iron (Fe), and the partial replacement of strontium (Sr) with the terbium (Tb). New compounds were prepared by ceramic method according to thermal program with several stages, then were characterized by XRD, SEM, EDX. Results showed that prepared compounds were crystallizing according to a tetragonal structure within the P42/mnm crystal system, particle size of Sr₂.₅Tb₀.₅CoCuO₇ was 50.27 nm, Sr_2.5Tb₀.₅CoFeO₇ 80.97nm. Specific resistance of prepared compounds was determined, results showed that the specific resistance of the Sr₂.₅Tb₀.₅CoCuO₇ at a temperature of 700°C amounted to 1.45Ω.cm² and that of Sr_2.5Tb₀.₅CoFeO₇ was 0.86Ω.cm². In conclusion, the physical and structural specifications of the prepared compounds qualify them for use in the field of solid fuel cells.