Oxygen Chemical Diffusion Coefficient of Uranium Dioxide
- 1 July 1970
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 53 (7) , 369-373
- https://doi.org/10.1111/j.1151-2916.1970.tb12134.x
Abstract
The diffusion of oxygen in UO2+α was measured between 600° and 1100°C. Samples with initial O/U values 2.08 and 2.04 were reduced in hydrogen; reduction was monitored continuously by electrical conductivity measurements. The relation between total conductivity and average O/U ratio was derived, and the diffusion coefficients were obtained. The validity of the electrical conductivity vs O/U relation was checked by measuring weight loss during reduction. Diffusion‐controlled kinetics were confirmed by oxygen gradient measurements. The oxygen chemical diffusion coefficient is given by D= 0.5 exp ‐ This equation agrees with previously determined values of the oxygen chemical diffusion coefficient of UO2+α.Keywords
This publication has 6 references indexed in Scilit:
- Steam Oxidation Kinetics and Oxygen Diffusion in UOz at High TemperaturesJournal of the American Ceramic Society, 1969
- Oxygen and uranium diffusion in uranium dioxide (a review)Journal of Nuclear Materials, 1969
- Determination of the Chemical Diffusion Coefficients in Single Crystals of CoO and NiO*Zeitschrift für Physikalische Chemie, 1966
- Electrical Properties of Nonstoichiometric Uranium DioxideThe Journal of Chemical Physics, 1961
- Kinetics of the reduction of U4O9 in hydrogenJournal of Inorganic and Nuclear Chemistry, 1958
- Kinetic Study of the Oxidation of Uranium DioxideThe Journal of Chemical Physics, 1957