Precipitation of morphology-controlled uranium( vi ) peroxide in nitric acid media

molar ratio have significantly enhanced both the final precipitation yield and the reaction kinetics. Furthermore, a correlation was found between the initial saturation index of the reaction mixture and the final morphology and crystallite size of the precipitated U(VI) peroxide, independent of the initial precipitation conditions. These results demonstrate that in highly acidic nitric media, it is possible to control the morphology of the precipitated U(VI) peroxide by simply adjusting the initial saturation index. This correlation opens up interesting perspectives for the synthesis of powders with specific morphologies, in particular uranium peroxide or corresponding oxide powders obtained after thermal treatment. This morphology control is of great interest in the field of nuclear fuel fabrication, as the characteristics of oxide powder, such as flowability or sintering reactivity, have a strong impact on the manufacturing process and the properties of the final ceramic.