Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (6): 800-804.DOI: 10.12068/j.issn.1005-3026.2015.06.010

• Materials & Metallurgy • Previous Articles     Next Articles

Study on the Preparation Process for CeO2 Superfine Powder

WU Wen-yuan, XUE Shou-feng, BIAN Xue, WANG Zhen-feng   

  1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2014-04-22 Revised:2014-04-22 Online:2015-06-15 Published:2015-06-11
  • Contact: wuwy@smm.neu.edu.cn)
  • About author:-
  • Supported by:
    -

Abstract: Compared with traditional precipitation process, a short process for preparation of CeO2 superfine powder was investigated by ultrasonic spray pyrolysis using CeCl3 solution as raw materials. The thermal decomposition process of CeCl3·7H2O was examined by TG-DTA experiments. CeO2 was prepared by the precipitation and spray pyrolysis method respectively at 600℃, which was characterized by XRD, SEM and TEM. The two methods were compared in terms of products, processes and the resource comprehensive utilization. The results showed that the reaction of CeCl3·7H2O at 25~233℃ was a dehydration reaction, the thermal decomposition start temperature was 500℃ and end temperature was 583℃. The product synthesized via ultrasonic spray pyrolysis has good dispersion, regular morphology and the particle size distribution between 0.11~0.80μm, while the morphologies of the products obtained by precipitation process was not regular and agglomerate was also observed. Obviously, ultrasonic spray pyrolysis method is a clean technology with short process, high level resource comprehensive utilization and controllable product morphologies.

Key words: ceria, spray pyrolysis, precipitation, XRD, thermodynamic

CLC Number: