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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
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document
Phase separation and crystallization in soda-lime borosilicate glass enriched in MoO3 studied by in situ Raman spectroscopy at high temperature
Abstract
Phase separation and crystallisation processes may arise in molten glass when the MoO3 content exceeds its solubility limit. Molybdenum combined with other elements such as alkali and alkaline-earth may form crystalline molybdates, known as "yellow phases" in nuclear glasses. In order to establish the sequence of phase separation and crystallization processes occurring during the cooling of the melt, a non-radioactive simplified glass composition was chosen in the SiO2-B2O3Na2O-CaO system, with 2mol.% MoO3 . Various cooling scenarios were tested: cooling by air blowing, quenching between two copper plates and cooling on metallic plate. The resulting glass specimens were then characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy in temperature. These observations made it possible to determine the sequence and the appearance temperature of phenomena upon cooling: first, a phase separation occurs, (small droplets dispersed in the molten glass) followed by molybdates crystallization inside the droplets.