Abstract
The kinetics of sintering of UO 2 compacts prepared from ammonium diuranate and calcined at 800°C have been studied in the temperature range 950–1500°C, in dry hydrogen atmosphere. The bulk density D s achieved at a desired period, has been determined by measuring the change in the volume of the pellets. At all temperatures studied, the bulk density and the sintering period t have been related by the expression D s = C log t + X, where C and X are constants. From these results the activation energy of the process has been evaluated and the mean value has been found to be 102 ± 10 kcal/mole.
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