Study of Sm0.2Ce0.8O1.9（SDC） electrolyte prepared by a simple modified solid-state method
来源期刊：JOURNAL OF RARE EARTHS2014年第8期
论文作者：殷仕龙 李梦楠 曾燕伟 李传明 陈小卫 叶祝鹏
文章页码：767 - 771
摘 要：Sm0.2Ce0.8O1.9（SDC） electrolyte was prepared by a modified solid state method at relatively low sintering temperatures without any sintering promoters. The phase composition and microstructure of the electrolytes were investigated by X-ray diffraction（XRD） and field emission scanning electron microscopy（FESEM） technologies. A relative density of SDC electrolyte sintered at 1300 oC reached 97.3% and the mean SDC grain size was about 770 nm. Their ionic conductivity and thermal expansion coefficient were also measured by electrochemical workstation and dilatometer. The electrolyte attained a high conductivity of 5×10–2 S/cm at 800 oC with an activation energy of 1.03 eV and a proper thermal expansion coefficient of 12.6×10–6 K–1.
殷仕龙，李梦楠，曾燕伟，李传明，陈小卫，叶祝鹏
State Key Laboratory of Materials-Oriented Chemical Engineering, School of Materials Science and Engineering, Nanjing Tech University
摘 要：Sm0.2Ce0.8O1.9（SDC） electrolyte was prepared by a modified solid state method at relatively low sintering temperatures without any sintering promoters. The phase composition and microstructure of the electrolytes were investigated by X-ray diffraction（XRD） and field emission scanning electron microscopy（FESEM） technologies. A relative density of SDC electrolyte sintered at 1300 oC reached 97.3% and the mean SDC grain size was about 770 nm. Their ionic conductivity and thermal expansion coefficient were also measured by electrochemical workstation and dilatometer. The electrolyte attained a high conductivity of 5×10–2 S/cm at 800 oC with an activation energy of 1.03 eV and a proper thermal expansion coefficient of 12.6×10–6 K–1.
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