The perovskite Cr-doped La0.6Sr0.4CrxFe1-xO3-δ (x=0.10, 0.20) oxides were synthesized via the citrate gel method. The perovskite forming of the Lao.6Sr0.4CrxFel-xO3-δ (x=0.10, 0.20) oxides were studied by ther- ...The perovskite Cr-doped La0.6Sr0.4CrxFe1-xO3-δ (x=0.10, 0.20) oxides were synthesized via the citrate gel method. The perovskite forming of the Lao.6Sr0.4CrxFel-xO3-δ (x=0.10, 0.20) oxides were studied by ther- mogravimetric analysis (TG), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). Structural and chemical stability under H2-containing helium atmospheres of Lao.6Sro.4CrxFel-xO3-δ (x=0.10, 0.20) were investigated by TG and XRD. The sintering microstructures of the perovskite Lao.6Sr0.4Cr2Fel-xO3-δ (x--0.10, 0.20) ceramics were investigated by scanning electron microscopy (SEM), and the electrical conduc- tivities of both oxide ceramics were also measured up to 900℃. The results demonstrated that the chemical stability of the Co-free Lao.oSro.4CrxFe1-xO3-δ (x=0.10, 0.20) oxides was significantly improved compared to the Co-containing Lao.6Sr0.4C00.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ oxides. The incorporation of Cr cations in the B-site of the pervoskite oxides resulted in the improved structural and chemical stability of the as-synthesized Lao.6Sr0.4CrxFe1-xO3-δ (x=0.10, 0.20) oxides.展开更多
基金supported by the "100 Talents Program" of Dalian Institute of Chemical Physics,CAS,China,and the Ministry of Education,Science and Technology of Korea
文摘The perovskite Cr-doped La0.6Sr0.4CrxFe1-xO3-δ (x=0.10, 0.20) oxides were synthesized via the citrate gel method. The perovskite forming of the Lao.6Sr0.4CrxFel-xO3-δ (x=0.10, 0.20) oxides were studied by ther- mogravimetric analysis (TG), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). Structural and chemical stability under H2-containing helium atmospheres of Lao.6Sro.4CrxFel-xO3-δ (x=0.10, 0.20) were investigated by TG and XRD. The sintering microstructures of the perovskite Lao.6Sr0.4Cr2Fel-xO3-δ (x--0.10, 0.20) ceramics were investigated by scanning electron microscopy (SEM), and the electrical conduc- tivities of both oxide ceramics were also measured up to 900℃. The results demonstrated that the chemical stability of the Co-free Lao.oSro.4CrxFe1-xO3-δ (x=0.10, 0.20) oxides was significantly improved compared to the Co-containing Lao.6Sr0.4C00.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ oxides. The incorporation of Cr cations in the B-site of the pervoskite oxides resulted in the improved structural and chemical stability of the as-synthesized Lao.6Sr0.4CrxFe1-xO3-δ (x=0.10, 0.20) oxides.