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Theses

Structure and dynamics of aluminosilicate glasses and melts

Abstract : Three ternary systems (SAS, BAS and ZAS) have been investigated within the framework of the PhD thesis. The main goals were the elaboration and characterization of previously poorly studied Sr, Ba and Zn aluminosilicate glasses. A systematic study has been carried out on glasses and in some cases on melts with various MO/Al₂O₃ (M = Sr, Ba, Zn) and SiO₂/Al₂O₃ ratios. The compositions studied cover a significant part of the ternary diagrams (from silicates to peraluminous glasses, from silica-poor to silica-rich compositions). This allowed expanding our knowledge of the vitrification domains in these systems. In order to obtain information on the structure and macroscopic properties of SAS, BAS and ZAS glasses, a multi-technique approach has been implemented. Such approach allows having a broad view on the systems and finding nano- to microscopic origins of macroscopic properties. The techniques used during the thesis probe short- (NMR, ND) to medium-range (Raman) scale and among the properties studied were density, viscosity and glass transition temperature. The data resulting from this thesis provides a better understanding of the changes in the structure and macroscopic properties of the aluminosilicate glasses produced by variations in MO/Al₂O₃ or SiO₂/Al₂O₃, or by the nature of non-network forming cation.
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Submitted on : Tuesday, December 11, 2018 - 3:45:08 PM
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Alexey Novikov. Structure and dynamics of aluminosilicate glasses and melts. Other. Université d'Orléans, 2017. English. ⟨NNT : 2017ORLE2041⟩. ⟨tel-01951698⟩

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