Kinetic study on the grain growth of PuO2 nanocrystals

Kinetic measurements on the grain growth of PuO2 nano-crystals are presented. On the basis of isothermal XRD measurements at temperatures of 820 °C, 900 °C, 1000 °C, and 1100 °C the activation energy for the crystallite growth of PuO2 nanopowder is determined as 351(5) kJ mol−1 in the temperature ra...

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Bibliographic Details
Published in:RSC advances 2019-01, Vol.9 (12), p.6542-6547
Main Authors: Bouëxière, Daniel, Popa, Karin, Walter, Olaf, Cologna, Marco
Format: Article
Language:English
Subjects:
Chemistry
Crystallites
Crystals
Grain growth
Nanocrystals
Plutonium dioxide
Surface diffusion
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Summary:Kinetic measurements on the grain growth of PuO2 nano-crystals are presented. On the basis of isothermal XRD measurements at temperatures of 820 °C, 900 °C, 1000 °C, and 1100 °C the activation energy for the crystallite growth of PuO2 nanopowder is determined as 351(5) kJ mol−1 in the temperature range from 820 to 1000 °C. Modelling shows that in this T range growth happens likely through surface diffusion.
ISSN:2046-2069
DOI:10.1039/c8ra10430a