Preparation of Fine Spherical Particle Sized Ceria by Precipitation Method with Ammonium Bicarbonate

Fine spherical panicle sized ceria (CeO2) was prepared by homogeneous precipitation method with ammonium bicarbonate as precipitant. The prepared CeO2 has the primary panicle size of 10-50nm when calcined between 400-700℃ analyzed by XRD and the aggregated particle size is about 300 nm measured by LASER panicle sizer. SEM, TGDTA and Zeta-potential analyzer were employed individually to study the morphology, and the fonnation of CeO2 product. It was found that excess NH4NO3 can serve as an sphericallization agent to prepare spherical Ce02 powder by precipitation method.