Study on the phase separation behavior of .sub.3O.sub.8 powder by high temperature oxidation

Several samples of (U.sub.1-xNd.sub.x).sub.3O.sub.8 with different Nd content were prepared by different process. After high temperature oxidation, the final oxidized products were found to be a mixture of small particles Nd-rich (U.sub.1-yNd.sub.y)O.sub.2+v phases and large particles Nd-poor (U.sub...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2019-04, Vol.320 (1), p.235
Main Authors: Fan, Fang-Li, Tan, Cun-Min, Wang, Jie-Ru, Tian, Wei, Qin, Zhi
Format: Article
Language:English
Subjects:
Backup software
Fluorine compounds
Fossil fuels
Nuclear energy
Nuclear fuel cycle
Oxidation-reduction reactions
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Summary:Several samples of (U.sub.1-xNd.sub.x).sub.3O.sub.8 with different Nd content were prepared by different process. After high temperature oxidation, the final oxidized products were found to be a mixture of small particles Nd-rich (U.sub.1-yNd.sub.y)O.sub.2+v phases and large particles Nd-poor (U.sub.1-zNd.sub.z).sub.3O.sub.8-w phases by XRD and SEM analysis. This study indicated that (U.sub.1-xNd.sub.x).sub.3O.sub.8 powder formed a solid solution firstly at 1100 °C or high. The recrystallization of this solid solution happened and the RE-rich fluorite phase formed concurrently when the temperature began to decrease. The present work will provide more information to understand the oxidation behavior of rare-earth doped U.sub.3O.sub.8 phase at high temperature.
ISSN:0236-5731
DOI:10.1007/s10967-019-06439-3