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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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Sarou-Kanian, Vincent
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Topics
Publications (11/11 displayed)
- 2024Crystallization Mechanisms in New Bismuth Borotellurite Glass-Ceramicscitations
- 2023Operando nuclear magnetic resonance spectroscopy: Detection of the onset of metallic lithium deposition on graphite at low temperature and fast charge in a full Li-ion batterycitations
- 2023Resolved-detrimental langasite-type surface crystallization in yttrium lanthanum gallium-rich heavy metal oxide glasses for infra-red optical fiber applications
- 2023Resolved‐detrimental surface crystallization in yttrium lanthanum gallate glasses for optical fiber applicationscitations
- 2020A comprehensive study of the glass/translucent anti-glass/transparent ceramic structural ordering in the Bi2O3Nb2O5–TeO2 systemcitations
- 2020La2Ga3O7.5: a metastable ternary melilite with a super-excess of inter- stitial oxide ions synthesized by direct crystallization of the meltcitations
- 2019Deconvolution method of $^{29}$Si MAS NMR spectra applied to homogeneous and phase separated lanthanum aluminosilicate glassescitations
- 2019Highly Transparent Fluorotellurite Glass-Ceramics: Structural Investigations and Luminescence Propertiescitations
- 2014Temperature Dependent 4-, 5- and 6-Fold Coordination of Aluminum in MOCVD-Grown Amorphous Alumina Films: From Local Coordination to Material Propertiescitations
- 2013Temperature-Dependent 4‑, 5- and 6‑Fold Coordination of Aluminum in MOCVD-Grown Amorphous Alumina Films: A Very High Field 27Al-NMR studycitations
- 2003Experimental study of the aluminum droplet combustion under forced convection. Influence of the gaseous atmosphere
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article
Deconvolution method of $^{29}$Si MAS NMR spectra applied to homogeneous and phase separated lanthanum aluminosilicate glasses
Abstract
The structural and microstructural properties of both homogeneous and phase separated lanthanum aluminosilicate (La$_2$O$_3$-Al$_2$O$_3$-SiO$_2$ i.e. LaAS system) glasses were investigated. The microstructural observations and the structural characterization by X-ray Diffraction and by Nuclear Magnetic Resonance have highlighted the role of aluminum to favor a homogeneous vitreous aluminosilicate network by a high-level of Al/Si intermixing. A qualitative and simplified structure description is proposed from $^{29}$Si nuclear magnetic resonance spectra assignment according to Q$^n$(mAl) species by controlling the deviation of chemical parameters. According to this approach, a homogeneous distribution of non-bridging oxygen in the aluminosilicate network and Al-O-Al linkages are considered for homogeneous glasses with high Al/Si atomic ratio. Phase separated samples are characterized by a low Al/Si atomic ratio inducing spinodal or nucleation/growth phase separation according to the depolymerization level. Homogeneity degree of the samples is discussed according to the intermixing level between silicon tetrahedra and aluminum polyhedra as a function of the proportion of Q$^n$ and Q$^n$(mAl) species.