稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
8期
767-771
,共5页
殷仕龙%李梦楠%曾燕伟%李传明%陈小卫%叶祝鹏
慇仕龍%李夢楠%曾燕偉%李傳明%陳小衛%葉祝鵬
은사룡%리몽남%증연위%리전명%진소위%협축붕
SDC electrolyte%modified solid-state method%ion conductivity%rare earths
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.
