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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Schuller, Sophie
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (39/39 displayed)
- 2023Modelisation of liquid nuclear waste vitrification : focus on the chemical processes
- 2023Rheology of a sodium‐molybdenum borosilicate melt undergoing phase separationcitations
- 2023Liquid-liquid phase separation in borosilicate glass enriched in MoO3 – experimental investigations and thermodynamic calculationscitations
- 2023Observation of glass synthesis by in-situ high temperature ESEM
- 2023Modeling phase separation in the melt
- 2022Spontaneously crystallizing glass-ceramic mechanisms
- 2022Liquid-liquid phase separation in borosilicate glass enriched in MoO3 experimental investigations and thermodynamic calculationscitations
- 2022Characterization and modeling of chemical reactions taking place during the vitrification of high level waste in cold cruciblecitations
- 2022Vitrification of wastes: from unwanted to controlled crystallization, a reviewcitations
- 2022Glass melting and phase separation: Modeling and simulation approaches
- 2021Characterization of immiscibility in calcium borosilicates used for the immobilization of Mo 6+ under Au‐irradiationcitations
- 2021Vitrification of wastes: from unwanted to controlled crystallization, a reviewcitations
- 2021Phase separation and crystallization mechanisms in nuclear glasses
- 2021An integrated thermodynamic approach for phase separation and crystallization in nuclear glasses
- 2021Aqueous alteration of silicate glass: state of knowledge and perspectivescitations
- 2020Mechanism of powellite crystallite expansion within nano-phase separated amorphous matrices under Au-irradiation.
- 2020Nuclear energy and waste vitrification
- 2020Mechanism of powellite crystallite expansion within nano-phase separated amorphous matrices under Au-irradiationcitations
- 2020Characterisation of immiscibility in calcium borosilicates used for the immobilisation of Mo 6+ under Au‐irradiationcitations
- 2020Thermodynamic Modelling of the Pd-Ru-Te-O for Nuclear High-Level Waste Immobilization
- 2019Swift heavy ion-irradiated multi-phase calcium borosilicates: implications to molybdenum incorporation, microstructure, and network topologycitations
- 2018Discovery of a maximum damage structure for Xe-irradiated borosilicate glass ceramics containing powellitecitations
- 2017Impacts of composition and beta irradiation on phase separation in multiphase amorphous calcium borosilicatescitations
- 2017Radionuclides containment in nuclear glasses: an overviewcitations
- 2017Influence of impregnation parameters on the structure and properties of plasma sprayed alumina coating impregnated with aluminum phosphate
- 2016Rare-earth silicate crystallization in borosilicate glasses: Effect on structural and chemical durability propertiescitations
- 2016133 Cs and 23 Na MAS NMR Spectroscopy of Molybdate Crystallization in Model Nuclear Glassescitations
- 2015Impact of crystallization of apatite on the structure and chemical durability of borosilicate glass
- 2015Combining experimental and computational solid state NMR: A new tool for structure determination of borosilicate glass
- 2015Phase separation and crystallization effects on the structure and durability of molybdenum borosilicate glasscitations
- 2015Modélisation thermodynamique de l'interaction entre le verre et les phases molybdates.
- 2012Mechanism of RuO2 Crystallization in Borosilicate Glass: An Original in Situ ESEM Approachcitations
- 2012Effect of temperature and thermal history on borosilicate glass structurecitations
- 2011Quantification of boron by epma in nuclear glass
- 2011Behaviour of the Eu3+ D-5(0) -> F-7(0) transition in CaMoO4 powellite type ceramics under Ar and Pb ions implantationcitations
- 2011Insight into sodium silicate glass structural organization by multinuclear NMR combined with first-principles calculationscitations
- 2008Phase separation and crystallization in soda-lime borosilicate glass enriched in MoO3 studied by in situ Raman spectroscopy at high temperature
- 2008Phase separation and crystallization in soda-lime borosilicate glass enriched in MoO3 studied by in situ Raman spectroscopy at high temperature
- 2001Effect of cooling rate and heat treatment on ceramic microstructure and chemical durability. Materials Research Society Symposium
Places of action
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document
Modélisation thermodynamique de l'interaction entre le verre et les phases molybdates.
Abstract
Fission products and actinides arising from the spent UOX fuel reprocessing are vitrified in borosilicate glass matrices. Among the fission products, platinum-group metals (Pd-Rh-Ru) exhibit very low solubility and partly precipitate as metal or oxide phases in the glass melt. Molybdenum can form molybdate phases which are known to precipitate in the glass as a complex molybdate phase called yellow phase. These molybdate phases may induce modifications of the physico-chemistry of the glass melt and have an impact on the final glass confinement properties.To understand the relative stability of these phases depending on both temperature and oxygen potential of the melt, a thermodynamic database is being developed using the Calphad method.This database includes the metallic and oxide complex platinoid system and the interactions with tellurium Pd-Rh-Ru-Te-(O). To consider the formation of molybdates, the CaO-MoO$_3$ and of Na$_2$O-MoO$_3$ pseudo binary systems are taken into account. The modeling of Na$_2$O-SiO$_2$ and of the ternary SiO$_2$-Na$_2$O-MoO$_3$ system was carried out based on the literature and on new experiments performed at the CEA.Using this tool, the thermodynamic state of the molybdate phases is calculated as a function of temperature and composition and the ruthenium redox behavior is predicted as a function of temperature and oxygen pressure in the melt. This study throws new light on the interactions between molybdenum and platinum-group metals with the glass melt during the vitrification process of high level nuclear waste.