Abstract : The carboreduction of uranium UO3 into uranium dioxide UO2 has been studied using two distinct mixtures of uranium trioxide and carbon powders, containing an excess of carbon (C/U=3 mole ratio). The specific surface area and the porous distribution of these mixtures were characterized by nitrogen adsorption, and thermogravimetry experiments were performed under flowing helium, up to 900°C, in order to characterize the reactivity of the mixtures. The course of the carbothermal reduction depends on the texture and the physical mixture of uranium trioxide and carbon: optimal reduction was obtained after a slight manual grinding of the initial mixture (UO3 + 3C), which improved the contact between uranium trioxide and carbon.
https://hal-emse.ccsd.cnrs.fr/emse-00787333
Contributeur : Andrée-Aimée Toucas
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Soumis le : lundi 11 février 2013 - 20:10:46
Dernière modification le : mercredi 29 novembre 2017 - 10:06:47
Florence Poncet, Françoise Valdivieso, Michèle Pijolat. Influence of texture and physical mixture of UO3 and C powders for carbothermal reduction. 9th CIMTEC, World Ceramics Congress, Jun 1998, Florence, Italy. 〈emse-00787333〉
