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Speciation of residual carbon contained in UO$_2$

Abstract : UO$_2$ powders were synthesized thanks to oxalic precipitation (platelet morphology) and sol-gel route and completely characterized. A secondary phase was found in addition of the oxide depending on the calcination atmospheres. This phase has been identified by Raman spectroscopy as graphitic material (i.e. carbon-based secondary compound) and quantified by thermogravimetric analyses. Its amount varies with the calcination atmosphere. The presence of this secondary phase has no significant effect on the lattice parameter and its specific surface area.
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Yannis Ziouane, Bénédicte Arab-Chapelet, Christelle Tamain, Sophie Lalleman, Thibaud Delahaye, et al.. Speciation of residual carbon contained in UO$_2$. Journal of Solid State Chemistry, Elsevier, 2016, 244, pp.45-51. ⟨10.1016/j.jssc.2016.09.003⟩. ⟨cea-02389158⟩

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