Preparation of Compound Ultrafine CeO_2 by Wet-Solid-Phase Mechanochemical Modification


Gu Ziyin , Chen Weifan, Hu Pinggui , Li Yongxiu (Engineering Research Center for Rare Earth, Nanchang University, Nanchang 330047, China; China National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Technology, Nanjing 210094, China)


<正> To satisfy practical requirements from industrial applications, an alternate route for synthesis compound ultra-fine CeO, powders by wet-solid-phase mechanochemical modification using industrial grade hydrated cerium carbonate as raw material was proposed. The effect of modifier reaction percentage, reaction time, calcining temperature and modifier amount on particle size, density, suspensibility, and hardness of compound CeO, powder was investigated. The phase evolutions of preparation process were characterized by XRD. SEM micrograph of the final product shows that compound CeO2 powders obtained are well-dispersed, spherically-shaped, uniformly-sized and submicron-sized particles. The method is readily available in raw material, low in cost, simple in process, and has great potential for industrialization. The compound CeO, powders of different physical properties can be synthesized by controlling the a-bove-mentioned influence factors in preparation process.


ultrafine; compound CeO2 powder; mechanochemical modification; preparation;rare earths


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