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Kinetic study on the grain growth of PuO2 nanocrystals
Daniel Bouëxière1, Karin Popa1, Olaf Walter1
1European Commission, DG Joint Research Centre, JRC-Karlsruhe P. O. Box 2340 76125 Karlsruhe Germany olaf.walter@ec.europa.eu.
RSC Advances
|May 6, 2022
Abstract:
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.

