Structural,Sintering and Electrical Properties of Cr-doped La0.6Sr0.4CrxFe1-xO3-δ(x=0.10,0.20) Oxides |
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作者姓名: | Jong Pyo Kim Sou Hwan Son Jung Hoon Park |
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作者单位: | Greenhouse Gas Research Center,Climate Change Technology Research Division,Korea Institute of Energy Research |
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基金项目: | supported by the “100 Talents Program” of Dalian Institute of Chemical Physics,CAS,China,and the Ministry of Education,Science and Technology of Korea |
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摘 要: | 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 La0.6Sr0.4CrxFe1-xO3-δ(x=0.10,0.20) oxides were studied by thermogravimetric analysis(TG),differential scanning calorimetry(DSC),and X-ray diffraction(XRD).Structural and chemical stability under H 2-containing helium atmospheres of La0.6Sr0.4CrxFe1-xO3-δ(x=0.10,0.20) were investigated by TG and XRD.The sintering microstructures of the perovskite La0.6Sr0.4CrxFe1-xO3-δ(x=0.10,0.20) ceramics were investigated by scanning electron microscopy(SEM),and the electrical conductivities of both oxide ceramics were also measured up to 900 C.The results demonstrated that the chemical stability of the Co-free La0.6Sr0.4CrxFe1-xO3-δ(x=0.10,0.20) oxides was significantly improved compared to the Co-containing La0.6Sr0.4Co0.2Fe0.8O3-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 La0.6Sr0.4CrxFe1-xO3-δ(x=0.10,0.20) oxides.
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关 键 词: | Perovskite Crystal structure Sintering Electrical conductivity |
收稿时间: | 2011-05-12 |
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