SYNTHESIS AND CHARACTERIZATION HOLLOW SPHERICAL La0,7Sr0,2Ca0,1Co0,9Fe0,1O3–δ (LSCCT) FOR CATHODE OF SOLID OXIDE FUEL CELL (SOFC)

H. H. Yu, X. Li, Z. G. Yuan, School of Material Science and Engineering, Shenyang Ligong University, Shenyang, China Hollow spheres structures of La0,7Sr0,2Ca0,1Co0,9Fe0,1O3–δ (LSCCT) have been synthesized via hydrothermal method using carbon spheres as template. The structure and electrical conductivity of obtained samples are characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and direct current (DC) four-probe method respectively. The results show that hollow spheres structures of LSCCT with the mean particle size of 0,9 1,2 μm is single perovskite. The electrical conductivity of the samples is higher than 100 S/ cm from 600 to 800 °C and can meet the demand of the electrical properties for the cathode materials.