Kinetics of thermal decomposition of CeO2 nanocrystalline precursor prepared by precipitation method |
| |
Authors: | Xiaolan Song Xi He Haiping Yang Dayu Xu Nan Jiang Guanzhou Qiu |
| |
Institution: | (1) Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha, 410083, China |
| |
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 three-dimensional diffusion mechanism.
Tanslated from Journal of Central South University (Science and Technology), 2007, 38(3): 428–432 译自: 中南大学学报(自然科学版] |
| |
Keywords: | CeO2 nanocrystals thermal decomposition kinetics thermo-gravimetric/differential scanning calorimetry (TG/DSC) |
本文献已被 万方数据 SpringerLink 等数据库收录! |
|