摘要
采用熔盐法制备了氧化铈纳米粉体,探讨了改变铈与熔融盐之间的比例和烧结温度对粉体粒度的影响,确定了可控粉体的最佳实验条件。通过TG-DTA、XRD、TEM、BET等测试方法对其物相、颗粒度、分散性、颗粒形貌和比表面积等性能进行了表征。结果表明,烧结温度为400℃、熔融盐与铈比为3∶1时,制备出分散性好、呈良好的结晶状态的类球状纳米晶粒,比表面积为84.9 m2.g-1,平均粒径为10.7nm;随着烧结温度的升高,粉体的粒径逐渐增大,当烧结温度为600℃时,粒径为26nm。
CeO2 nano - powders were synthesized by one step molten salts method. The powders＇ phases and diameters can be controlled by altering the contents of Ce and molten salts and the calcination temperature. The phase, particle shapes, particle size and specific surface area of the CeO2 powders were characterized by TG - DTA, XRD, TEM and BET. The results show that while the ratio of contents of molten salts and Ce is 3： 1, CeO2 powders calcined at 400℃ have a cubic fluorite structure, the surface areas of 84.9m^2/g , an average size of 10.7nm and a high dispersion behavior. The particle size is enhanced gradually with the increasement of calcination temperature. The structures of products were stable with the calcination temperature 600℃ and an average size 26nm.
出处
《稀土》
EI
CAS
CSCD
北大核心
2008年第6期17-20,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
