Oxygen potential measurement of U0.85Am0.15O2 at 1473, 1573, and 1673 K
Source abstract
Abstract
Oxygen potential data of U 0.85Am 0.15O 2− x were measured at 1473, 1573, and 1673 K by thermogravimetry. In U 1− yAn yO 2− x, where An stands for Pu or Am, and for a given value of “y” and Oxygen/Metal ratio, the oxygen potential of U 1− yAm yO 2− x is higher than that of U 1− yPu yO 2− x. The valence of cations in the hypostoichiometric region is similar to that of Nd-doped UO 2 . At the stoichiometric composition, it is estimated to be Am 3+, U 4+, and U 5+ (for charge compensation of Am 3+ ) in the stoichiometric composition. The experimental data were analyzed using a defect chemistry model, and a relationship connecting the oxygen-to-metal ratio, the temperature, and the equilibrium oxygen partial pressure was proposed.
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Research context
OpenAlex topics: Nuclear Materials and Properties · Radioactive element chemistry and processing · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
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