Synthesis of perovskite-type strontium doped lanthanum manganite powders by co-precipitation method for solid oxide fuel cells

Lanthanum strontium manganite (La1-xSrxMnO3, LSM) has been studied as a promising material for application as a cathode in solid oxide fuel cells. In this work, La0.75Sr0.25MnO3 powder has been prepared by co-precipitation method and characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energydispersive X-ray (EDAX) spectrometer, and physical adsorption of N2. Co-precipitation can produce fine, high-purity, stoichiometric particles of single and multicomponent metal oxides. The thermal stability of sample has been studied bythermal gravimetric (TG) and differential thermal analyses (DTA). The XRD analysis shows only the pattern corresponding to perovskite-type LSM which crystallizes in the rhombohedral system. The results showed that porous perovskite type ultrafine powder has been prepared in 91% yield. The LSM particles with an average size of about 223 nm obtained at 850 °C with heating rate 5 °C/min. Magnetic measurements revealed that the as-prepared LSM has a ferromagnetic properties at room temperature

Keywords:

SOFC , Cathode , Lanthanum Strontium Manganite , Perovskite , Co-precipitation