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Influence of texture and physical mixture of UO3 and C powders for carbothermal reduction

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.
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Conference papers
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https://hal-emse.ccsd.cnrs.fr/emse-00787333
Contributor : Andrée-Aimée Toucas <>
Submitted on : Monday, February 11, 2013 - 8:10:46 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:21 PM

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  • HAL Id : emse-00787333, version 1

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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⟩

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