Quantitative determination of the phosphorus ...
Type de document :
Article dans une revue scientifique
DOI :
URL permanente :
Titre :
Quantitative determination of the phosphorus environment in lithium aluminosilicate glasses using solid-state NMR techniques
Auteur(s) :
Glatz, Pauline [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Comte, Monique [Auteur]
Montagne, Lionel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Doumert, Bertrand [Auteur]
Institut Michel Eugène Chevreul - FR 2638 [IMEC]
Cormier, Laurent [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Comte, Monique [Auteur]
Montagne, Lionel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Doumert, Bertrand [Auteur]
Institut Michel Eugène Chevreul - FR 2638 [IMEC]
Cormier, Laurent [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Titre de la revue :
Physical Chemistry Chemical Physics
Numéro :
21
Pagination :
18370-18379
Date de publication :
2019-07-31
Discipline(s) HAL :
Chimie/Chimie inorganique
Résumé en anglais : [en]
We investigated using solid-state NMR spectroscopy the short-range structural features in lithium aluminosilicate glasses with the addition of P2O5 and considering various Al2O3/Li2O ratios. The phosphorus environment is ...
Lire la suite >We investigated using solid-state NMR spectroscopy the short-range structural features in lithium aluminosilicate glasses with the addition of P2O5 and considering various Al2O3/Li2O ratios. The phosphorus environment is determined quantitatively using 31P Magic Angle Spinning NMR constrained by results obtained from 31P–27Al Multiple-Quantum Coherence-based NMR techniques. Phosphorus is mainly located as orthophosphate and pyrophosphate species in glasses with a low amount of Al2O3. These depolymerized units disappear with increasing Al2O3 content and a strong affinity of PO4 tetrahedra for aluminum is revealed, which reduces phase separation. The local environments of framework (Si and Al) and charge-balancing (Li) cations are also studied through NMR experiments to assess the influence of P2O5 addition. The Si environment is mostly modified by the presence of P2O5 in glasses containing a low amount of Al2O3, with an increase of Q4Si species in relation to phase separation phenomena observed in these compositions. Conversely, P2O5 addition does not have a significant influence on the 27Al NMR response. 7Li NMR spectra reflect a change in the structural role of Li when P2O5 or Al2O3 is added. The observed structural changes can be rationalized to improve our knowledge of the structure–property relationships, focusing, in particular, on phase separation and nucleation/crystallization processes that are strongly affected by the presence of P and the evolution of its local environment with composition.Lire moins >
Lire la suite >We investigated using solid-state NMR spectroscopy the short-range structural features in lithium aluminosilicate glasses with the addition of P2O5 and considering various Al2O3/Li2O ratios. The phosphorus environment is determined quantitatively using 31P Magic Angle Spinning NMR constrained by results obtained from 31P–27Al Multiple-Quantum Coherence-based NMR techniques. Phosphorus is mainly located as orthophosphate and pyrophosphate species in glasses with a low amount of Al2O3. These depolymerized units disappear with increasing Al2O3 content and a strong affinity of PO4 tetrahedra for aluminum is revealed, which reduces phase separation. The local environments of framework (Si and Al) and charge-balancing (Li) cations are also studied through NMR experiments to assess the influence of P2O5 addition. The Si environment is mostly modified by the presence of P2O5 in glasses containing a low amount of Al2O3, with an increase of Q4Si species in relation to phase separation phenomena observed in these compositions. Conversely, P2O5 addition does not have a significant influence on the 27Al NMR response. 7Li NMR spectra reflect a change in the structural role of Li when P2O5 or Al2O3 is added. The observed structural changes can be rationalized to improve our knowledge of the structure–property relationships, focusing, in particular, on phase separation and nucleation/crystallization processes that are strongly affected by the presence of P and the evolution of its local environment with composition.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
RMN et matériaux inorganiques (RM2I)
Date de dépôt :
2019-09-25T15:12:32Z
2020-10-23T10:35:12Z
2020-10-23T10:35:12Z