Abstract:  The synthesis process for La_1-xSr_xMn_1-yCo_yO_3-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,16.4μmand 1.38m²/mL,respectively, for mixed reactants and are 23.81μm, 32.11μmand 0.5m²/mL, respectively, for powder synthesized at 1200℃for 8hin air.

Key words:   solidstate reaction synthesis; La_1-xSr_xMn_1-yCo_yO_3-δ； perovskite; intermediate temperature SOFCs