Preparation of Fine Spherical Particle Sized Ceria by Precipitation Method with Ammonium Bicarbonate
来源期刊：JOURNAL OF RARE EARTHS2005年第1期
论文作者：Cui Dali Zhang Guocheng Zhu Zhaowu Zhang Shunli Long Zhiqi
Key words：spherical; fine particle; ceria; precipitation; ammonium bicarbonate; rare earths;
Abstract: Fine spherical particle sized ceria (CeO2) was prepared by homogeneous precipitation method with ammonium bicarbonate as precipitant. The prepared CeO2 has the primary particle size of 10～50 nm when calcined between 400～700 ℃ analyzed by XRD and the aggregated particle size is about 300 nm measured by LASER particle sizer. SEM, TG-DTA and Zeta-potential analyzer were employed individually to study the morphology and the formation of CeO2 product. It was found that excess NH4NO3 can serve as an sphericallization agent to prepare spherical CeO2 powder by precipitation method.
Cui Dali1，Zhang Guocheng1，Zhu Zhaowu1，Zhang Shunli1，Long Zhiqi1
(1.Advanced Materials Co. Ltd., Beijing General Research Institute of Nonferrous Metals, Beijing 100088, China)
Abstract:Fine spherical particle sized ceria (CeO2) was prepared by homogeneous precipitation method with ammonium bicarbonate as precipitant. The prepared CeO2 has the primary particle size of 10～50 nm when calcined between 400～700 ℃ analyzed by XRD and the aggregated particle size is about 300 nm measured by LASER particle sizer. SEM, TG-DTA and Zeta-potential analyzer were employed individually to study the morphology and the formation of CeO2 product. It was found that excess NH4NO3 can serve as an sphericallization agent to prepare spherical CeO2 powder by precipitation method.
Key words:spherical; fine particle; ceria; precipitation; ammonium bicarbonate; rare earths;
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