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篇目详细内容 |
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【篇名】 |
Kinetics of thermal decomposition of CeO2 nanocrystalline precursor prepared by precipitation method |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s11458-008-0035-y |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2008 |
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【卷期】 |
3
卷2期 |
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【页码】 |
182-185
页,共
4
页 |
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【作者】 |
SONG Xiaolan;
HE Xi;
YANG Haiping;
XU Dayu;
JIANG Nan;
QIU Guanzhou;
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【关键词】 |
CeO2 nanocrystals; thermal decomposition kinetics; thermo-gravimetric/differential scanning calorimetry (TG/DSC) |
【摘要】 |
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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. |
