| Doped SrTiO3 is considered to be the potential anode material for SOFC because of its mixed ionic-electronic conductivities and excellent catalysis to hydrocarbon fuels. In this paper, the preparation and electrical performance of SrTiO3 used for SOFC anode materials were investigated.The calcinations process of Y2O3 doped SrTiO3 Sr1-1.5xYxTiO3 (x=0.01, 0.02, 0.03, 0.04, 0.05) and La2O3 doped SrTiO3 Sr1-1.5xLaxTiO3 (x=0.1, 0.2, 0.3, 0.4, 0.5) were investigated by DSC-TG. The structure of the 1100℃calcined powders was examined by X-ray diffraction (XRD). The optimal sintering temperature of SrTiO3 doped with different substances was investigated based on DIL analysis. Density of samples was measured by the Archimedes principle. The relative density of Y2O3 doped SrTiO3 samples is larger than 93 %, and La2O3 doped SrTiO3 is larger than 94 %.Electrical performance of doped SrTiO3 was studied. The conductivity of doped SrTiO3 showed a peak as the increase of dopant content, and decreased with the increase of test temperature. Y2O3 doped SrTiO3 sintered at 1400℃is higher than that at 1450℃. The conductivity reached the maximal 26.3 S/cm at 800℃when the content of Y2O3 was 8mol%. The conductivity of La2O3 doped SrTiO3 sintered at 1600℃was 103.5 S/cm at 800℃when the content of La2O3 was 30mol%. There is no chemical reaction between doped SrTiO3 and YSZ sintered at 1400℃that showed good chemical compatibility.Complex-doped SrTiO3 was studied in order to improve the electrical performance of the anode materials. But the association of defects in the complex-doped SrTiO3 have disadvantage to the improvement of electrical conductivity.
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