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中文摘要：
采用传统固相反应法制备陶瓷试样，借助EIS、XRD及SEM等技术手段研究了烧结助剂Co2O3对Ce0.8Gd0．2O1.9（CGO）的体密度、导电性能、相组成及微观结构的影响。结果表明，当CGO中添加2．59，6（质量分数）Co2O3时，可使CGO试样的烧结温度降低200℃。添加0．75％（质量分数）Co2O3时，试样的晶粒电导率明显增大，晶界电导率下降，添加量为1．0%～2．5％（质量分数）时，晶粒电导率趋于不变，晶界电导率稍微有所增加。XRD图谱表明，试样在1100～1200℃烧结时表现为CGO纯相，在1300～1400℃的较高温度烧结时，为CGO相及少量的Ce24Co11相。
英文摘要：
Ceo.8 Gd0.2 O1.9 ceramic samples were prepared by solid state reaction. The effects of sintering additives of Co2O3 on the bulk density, conduction properties, phase structure and microstructures of Ce0.8Gd0.2O1.9 were investigated by EIS, XRD and SEM. The results show that Co2O3 is very effective as a sintering additive. When doped with 2.5wt% Co2O3, the sintering temperature of CGO sample can be reduced by 200℃. Addition of 0.75wt% Co2O3 can increase bulk conductivity of CGO, while grain boundary conductivity reduces. When doping contents of Co2O3 is from lwt% to 2.5wt%, bulk conductivity approaches constant, but grain boundary conductivity has a little enhance. XRD results indicate that CGO-Co samples sintered at 1100-1200℃, is pure phase; while samples sintered at 1300-1400℃,contains a small amount of Ce24Co1l phase besides CGO phase.
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