Synthesis and Electrical Properties of Perovskite-type Oxides Made by Glycine-Nitrate Process

La0.6Sr0.4Fe0.8Co0.2O3 oxides powders of perovskite-type were synthesized by the low temperature Glycine-Nitrate Process(GNP). The contributing factors to the crystal structure and morphology of synthesized powders were examined, and the desired synthesis conditions were studied. The influences of sintering temperature on the electrical conductivities were studied, indicating that the sample sintered at 1200℃ showed highest electrical conductivity. In the range of room temperature to 900℃, the electrical conductivities of the samples sintered at different temperatures respectively increase with temperature to the maximums near 600℃ and then decrease. It was verified that the hopping of small polaron is the dominating mechanism of the electrical conduction at low temperatures. The samples sintered at different temperatures have similar activation energies of 0.103-0.122eV. Compared with the La0.6Sr0.4Fe0.8Co0.2O3 synthesized by the conventional solid state reaction method, those synthesized by GNP exhibit better sintering activity and electrical conductivities.