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Erschienen in: Journal of Materials Engineering and Performance 8/2010

01.11.2010

Kinetics of Nanoscale Cerium Dioxide Prepared by Pechini Process

verfasst von: Teng Zhang, Dian Tang, Yanqun Shao, Zhenping Yu

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 8/2010

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Abstract

The crystallization kinetics of nanoscale cerium dioxide particles prepared by Pechini method was investigated by various non-isothermal methods using differential scanning calorimetry. The activation energies for the crystallization calculated from modified Kissinger and Ozawa equations are 19.7 and 22.4 kJ/mol, respectively, which are much lower than that of solid-state reaction. The Avrami exponent calculated from Ozawa equation is about 1.5, indicating that the nucleation process is controlled by long-range diffusion in the early stage, and the small nuclei grow into various shapes. The nucleation rate decreases as the reaction proceeds. In addition, the kinetics of crystal growth was also studied.

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Metadaten
Titel
Kinetics of Nanoscale Cerium Dioxide Prepared by Pechini Process
verfasst von
Teng Zhang
Dian Tang
Yanqun Shao
Zhenping Yu
Publikationsdatum
01.11.2010
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 8/2010
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-010-9600-x

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