Titre :

Role of vanadium oxide on the lithium silicate glass structure and properties

Auteur(s) :

Gaddam, Anuraag [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Universidade de Aveiro
Allu, Amarnath R. [Auteur]
Fernandes, Hugo R. [Auteur]
Stan, George E. [Auteur]
Negrila, Catalin C. [Auteur]
Jamale, Atul P. [Auteur]
Mear, François [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Montagne, Lionel [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Ferreira, Jose M. F. [Auteur]

Titre de la revue :

Journal of the American Ceramic Society

Numéro :

104

Pagination :

2495-2505

Éditeur :

Wiley

Date de publication :

2021-01-04

ISSN :

0002-7820

Mot(s)-clé(s) en anglais :

glass
vanadium compounds
vanadium
structure
lithium silicate
ionic conductivity

Discipline(s) HAL :

Chimie/Catalyse
Chimie/Matériaux
Chimie/Chimie inorganique

Résumé en anglais : [en]

The structural role of V in 28Li2O–72SiO2 (in mol%) lithium silicate glass doped with 0.5 mol% V2O5 was assessed using 29Si and 51V Nuclear Magnetic Resonance (NMR), Fourier-transform infrared (FTIR), and X-ray photoelectron ...
Lire la suite >The structural role of V in 28Li2O–72SiO2 (in mol%) lithium silicate glass doped with 0.5 mol% V2O5 was assessed using 29Si and 51V Nuclear Magnetic Resonance (NMR), Fourier-transform infrared (FTIR), and X-ray photoelectron (XPS) spectroscopy techniques. Despite the low amount of V2O5 used, the structural information obtained or deduced from the statistical analysis of the NMR data could explain the evolution of glass properties after V2O5 addition. The XPS results indicated that all vanadium exists in 5+ oxidation state. Both the 29Si NMR and FTIR data point toward an increase in the polymerization of the silicate network, caused by the V2O5 acting as network former, capable to form various QnV tetrahedral units (for n = 0, 1, and 2) in the glasses. These QnV units, which are similar to phosphate units, scavenge the Li+ ions and cause the silicate network to polymerize. However, in an overall balance, the entire glass network is depolymerized due to the additional nonbridging oxygens contributed by the vanadium polyhedra. The addition of vanadium causes the network to expand and increases the ionic conductivity.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

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

Équipe(s) de recherche :

RMN et matériaux inorganiques (RM2I)

Date de dépôt :

2022-03-02T07:15:26Z
2023-11-30T14:59:13Z