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Citation: HAN Feng, MA Wei-Min, MA Lei, SUN Yang, SHI Shu-Jun, LI Xiao-Long, GUAN Ren-Guo. Effect of the NSC and RSC Co-precipitation Methods on Apparent Activation Energy of Pr2Zr2O7 Nanopowders[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(4): 811-820. doi: 10.11862/CJIC.2014.089 shu

Effect of the NSC and RSC Co-precipitation Methods on Apparent Activation Energy of Pr2Zr2O7 Nanopowders

  • 1.

    1 Key Laboratory for Advanced Ceramics and Application of Shenyang, School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China;

  • Corresponding author: MA Wei-Min, 
  • Received Date: 30 August 2013
    Available Online: 31 October 2013

    Fund Project: 沈阳市先进陶瓷制备技术及应用重点实验室建设项目(No：F12-259-1-00)资助项目。 (No：F12-259-1-00)

  • The Pr2Zr2O7 nanoparticles were prepared by using NSC and RSC co-precipitation method with ammonia as precipitant agent. XRD, SEM, TEM and TG-DTA were applied to analysis the crystallization and morphology of the samples. Synthesis kinetics of the preparation process and dynamics of grain growth were studied, and the apparent activation energy was calculated respectively by using Doyle-Ozawa method and the Kissinger method. The results show that the samples topography near spherical, there are no agglomeration and the mean particle size is about 60nm. They were obtained under the conditions of titration rate, 2 mL·min-1, initial concentration of resolution, 0.05 mol·L-1, system temperature 273K and calcination at 1173 K for 2 h by RSC. The average apparent activation energy of the particles, obtained by NSC, were 71.2, 97.8 and 183.2 kJ·mol-1 in each stage and the RSCs were 45.37, 84.34 and 152.16 kJ·mol-1; the grain growth activation energy of them were 19.02 and 11.95 kJ·mol-1 respectively, the latter decreases 7.07 kJ·mol-1 than the former. Reverse co-precipitation preparation technology is better than that of positive co-precipitation method.
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