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J Mater Sci Technol  2004, Vol. 20 Issue (04): 438-440    DOI:
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Morphology Controlling of the Ultrafine Cerium Dioxide (CeO2) Precursor
Jianqing CHEN, Zhigang CHEN, Jinchun LI
College of Materials Science and Technology, Jiangsu University, Zhenjiang 212013, China
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Abstract  The synthesis of ultrafine cerium dioxide precursor via homogeneous precipitation was studied. Mixed aqueous solution of anhydrous cerium nitrate and urea was first heated to 85℃ for 2 h, and the prepared suspension was then aged at room temperature for various periods of time. White precipitate was finally collected by centrifuging and washed with distilled water and anhydrous ethanol. The obtained cerium dioxide (CeO2) precursor was observed with SEM. It was found that the morphology and size of the precursor were strongly affected by aging time and stirring conditions (with or without stirring). The precipitated fine spherical particles of the precursor changed their shape from ellipse to slice or directly to slice. Fine spherical monodispersed (300 nm) precursor powders could be obtained by controlling the aging time. Stirring the solution also could change the reaction process and thus the morphology and size of the precursor are changed.
Key words:  Cerium dioxide (CeO2) precursor      Homogeneous precipitation      Ageing time      
Received:  01 January 1900     
Corresponding Authors:  Zhigang CHEN     E-mail:  qingerchen@vip.sina.com

Cite this article: 

Jianqing CHEN, Zhigang CHEN, Jinchun LI. Morphology Controlling of the Ultrafine Cerium Dioxide (CeO2) Precursor. J Mater Sci Technol, 2004, 20(04): 438-440.

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