Title :

Quantitative determination of the phosphorus environment in lithium aluminosilicate glasses using solid-state NMR techniques

Author(s) :

Glatz, Pauline [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Comte, Monique [Auteur]
Montagne, Lionel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Doumert, Bertrand [Auteur]
Institut Michel Eugène Chevreul - FR 2638 [IMEC]
Cormier, Laurent [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]

Journal title :

Physical Chemistry Chemical Physics

Volume number :

21

Pages :

18370-18379

Publication date :

2019-07-31

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

RMN et matériaux inorganiques (RM2I)

Submission date :

2019-09-25T15:12:32Z
2020-10-23T10:35:12Z