摘要
用微乳液和碳吸附耦合法制备了氧化钐、氧化钆二元稀土掺杂氧化铈纳米粉体(Sm2O3)0.08(G d2O3)0.02(C eO2-δ)0.8。探讨了碳黑的加入量对粉体表面积的影响,得到最佳的碳黑加入量。利用XRD、TEM和BET方法对其物相、分散性、颗粒形貌和比表面积等性能进行了表征。结果表明:700℃焙烧的粉体呈现良好的结晶状态,为立方萤石结构,比表面积为65m2/g,平均颗粒直径为12nm,分散良好。利用交流阻抗法测试了材料的电导率。结果表明,电导率随烧结温度的升高而增大。
The Sm2O3,Gd2O3 doped CeO2 nano-powders (Sm2O3)0.08(Gd2O3)0.02 (CeO2-δ)0.8 were synthesized by a reverse micelles and carbon absorption method. The addition of carbon showed a great influence on of the nano- powders. The optimum content of carbon was found. The phase, particle size and specific surface area of the (Sm2 O3 )0. 08 (Gd2O3)0. 02 (CeO2-δ)0. spowders were characterized by XRD, TEM and BET. The results show that (Sm2O3)0.08 (Gd2O3)0.02(CeO2-δ)0.8 powders calcinated at 700℃ have a cubic fluorite structure,the surface areas of 65m^2/g,an average size of 12 nm and a high dispersion behavior. The ionic conductivity of (Sm2O3)0.08(Gd2O3)0.02(CeO2-δ)08 electrolytes was measured by the a. c impedance spectroscopy technique. The effect of sintering temperature on the ionic conductivity was studied. The ionic conductivity increases with the increase of the sintering temperature.
出处
《稀土》
EI
CAS
CSCD
北大核心
2006年第3期35-38,共4页
Chinese Rare Earths
基金
内蒙古科技厅攻关计划项目(20010808)
教育部人才基金项目
关键词
氧化铈
纳米粉体
固体电解质
电导率
碳吸附
ceria
nano - powders
solid electrolyte
electronic conductivity
carbon absorption