Conversion of actinide nitrate surrogates into oxide using combustion synthesis process: A facile approach - Université de Montpellier
Article Dans Une Revue Journal of Nuclear Materials Année : 2019

Conversion of actinide nitrate surrogates into oxide using combustion synthesis process: A facile approach

Résumé

In recent years, the focus of research in the conversion routes for the actinide nitrates into oxides for the generation IV nuclear fuel cycle have attracted rapidly growing interest. One process is the self-sustained exothermic reaction of Solution Combustion Synthesis (SCS) methodology. It was applied here to the reaction of an actinide surrogate Gd(NO3)3,6H2O with glycine in air to produce ∼10−3 mol amounts of Gd2O3. The primary process parameters were the Gd/glycine ratio and heating rate, which affected the ignition temperature of the precursor mixture. An optimum ratio of one and a heating rate of 10 K  min−1 resulted in nearly complete SCS conversion over the 483–573 K temperature range and ultrafine gadolinia powders. The 100- to 500-fold swelling of the reactant mixture plays a dynamic role in the reactivity of the system. Final products were characterized by X-Rays Diffraction (XRD), surface area analysis, carbon content, and Scanning Electron Microscopy (SEM). The structural characteristics of the final gadolinia phases have been interpreted by the adiabatic flame temperature calculation.

Domaines

Matériaux
Fichier principal
Vignette du fichier
S0022311519303186.pdf (1.35 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02417003 , version 1 (25-10-2021)

Licence

Identifiants

Citer

Julien Monnier, Cyrielle Rey, S. Chandra Mohan, J. Causse, E. Welcomme, et al.. Conversion of actinide nitrate surrogates into oxide using combustion synthesis process: A facile approach. Journal of Nuclear Materials, 2019, 525, pp.14-21. ⟨10.1016/j.jnucmat.2019.07.021⟩. ⟨hal-02417003⟩
71 Consultations
48 Téléchargements

Altmetric

Partager

More