Kinetics of thermal decomposition of CeO2 nanocrystalline precursor prepared by precipitation method
Xiaolan SONG 1Xi HE 1Haiping YANG 1Dayu XU 1Nan JIANG 1Guanzhou QIU1
作者信息
- 1. Department of Inorganic Materials,School of Resources Processing and Bioengineering,Central South University,Changsha 410083,China
- 折叠
Abstract
The thermal decomposition of CeO2 nanocrystalline precursor prepared by chemical precipitation method was investigated using thermo-gravimetric/differential scanning calorimetry (TG/DSC) and X-ray powder diffraction (XRD).In particular,the differential thermal analysis curves for the decomposition of CeO2 nanocrystalline precursor were measured at different heating rates in air by a thermal analyzer (NETZSCH STA 449C,Germany).The kinetic parameters of the thermal decomposition of CeO2 nanocrystalline precursor were calculated using the Kissinger method and the Coats-Redfern method.Results show that the apparent active energy E of the reaction is 105.51 kJ/mol,the frequency factor lnA is 3.602 and the reaction order n is 2.This thermal decomposition process can be described by the anti-Jander equation and a threedimensional diffusion mechanism.
Key words
CeO2 nanocrystals,thermal decomposition kinetics,thermo-gravimetric/differential scanning calorimetry (TG/DSC)引用本文复制引用
基金项目
International Cooperation Project of Science and Technology Ministry of China(2005DFBA028)
国家自然科学基金(59925412)
出版年
2008
NETL
NSTL
万方数据