Preparation of Perovskite-Type Oxides La_(1-x)Sr_xFe_(1-y)Co_yO_3 Using EDTA Sol-Gel Method

【Author】

Yu Jie, Ma Wenhui~*,Wang Hua(Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming, 650093, China)

【Abstract】

Two series of perovskite-type oxides with composition (La_(1-x))Sr_xFeO_3(x≤0.8)and La_(1-x)Sr_xFe_(1-y)Co_yO_3(x=0.2; y=0.2, 0.4)powder productions were synthesized by EDTA complexing sol-gel method. The products were characterized by XRD, TEM, SEM, BET method(N_2 adsorption)and laser granularity analysis for different synthesis conditions to obtain the optimum conditions for the preparation process. Single-phased, uniform perovskite-type oxides with small particle size were obtained by EDTA sol-gel process with high stability and repeatability, and the process temperature is much lower than that of solid state reaction method.

【Keywords】

perovskite; La_(1-x)Sr_xFe_(1-y)Co_yO_3; EDTA sol-gel method; preparation process;rare earths

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