Solid-state synthesis of Sr- and Co-doped LaMnO3 perovskites
(Faculty of Materials and Metallurgical Engineering,
Kunming University of Science and Technology, Kunming 650093, P.R.China)
Kunming University of Science and Technology, Kunming 650093, P.R.China)
Abstract: The synthesis process for La1-xSrxMn1-yCoyO3-δ(x =0.2, 0.3;y =0.2, 0.8,designated as LSMC below) perovskite oxides prepared by solid state reaction was investigated using DSC/TG, XRD, EPMA and particle size analysis methods. It was found that LSMCs were all of single phase and the synthesis process might be divided into three stages: the decomposition of reactants, the formation of LaMn(Co)O3-based oxides, and the formation of LSMC solid solution. Typical average and the peak value of particle size, and the specific surface area are 14.65μm,16.4μmand 1.38m2/mL,respectively, for mixed reactants and are 23.81μm, 32.11μmand 0.5m2/mL, respectively, for powder synthesized at 1200℃for 8hin air.
Key words: solidstate reaction synthesis; La1-xSrxMn1-yCoyO3-δ； perovskite; intermediate temperature SOFCs