Titre :

The influence of B2O3 on structure and ionic conductivity of lithium phosphate-niobate glasses

Auteur(s) :

Hostinsky, Tomas [Auteur]
Department of General and Inorganic Chemistry [University of Pardubice]
Koudelka, Ladislav [Auteur]
Department of General and Inorganic Chemistry [University of Pardubice]
Mošner, Petr [Auteur]
Department of General and Inorganic Chemistry [University of Pardubice]
Tricot, Gregory [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Drobná, Helena [Auteur]
University of Pardubice
Razum, Marta [Auteur]
Institut Ruđer Bošković [IRB]
Šantić, Ana [Auteur]
Rudjer Boskovic Institute [Zagreb]

Titre de la revue :

J. Non-Cryst. Solids

Nom court de la revue :

J. Non-Cryst. Solids

Numéro :

646

Pagination :

-

Date de publication :

2024-11-18

ISSN :

0022-3093

Mot(s)-clé(s) en anglais :

Borophosphate glasses
Thermal properties
Glass structure
NMR spectra
Raman spectra

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

Glasses in the series (100-x)[0.4Li2O-0.2Nb2O5-0.4P2O5]-xB2O3 were prepared with B2O3 content ranging from 0 to 48 mol%. The glass transition temperature (Tg) increases with up to 8 mol% B2O3, peaking at 512 °C, then ...
Lire la suite >Glasses in the series (100-x)[0.4Li2O-0.2Nb2O5-0.4P2O5]-xB2O3 were prepared with B2O3 content ranging from 0 to 48 mol%. The glass transition temperature (Tg) increases with up to 8 mol% B2O3, peaking at 512 °C, then decreases to 490 °C at 40 mol% B2O3. Raman spectra at low B2O3 content indicate the presence of NbO6 octahedra. XRD patterns of crystallized samples reveal NbOPO4 formation across the entire composition range. Confrontation of the Raman spectra of glasses and crystalized glasses resulted in the assignment of the broad Raman band at 777–804 cm−1 to Nb−O−Nb vibrations in the NbO6 octahedra. 11B MAS NMR shows a transition from BO4 to BO3 units, while 31P MAS NMR suggests mixed borate-phosphate structures. Using 2D NMR techniques, mixed species were identified in the glass network. Ionic conductivity remained stable up to 16 mol% B2O3 but decreased significantly at higher concentrations due to reduced Li+ ion mobility in the mixed phosphate-borate network.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Équipe(s) de recherche :

Propriétés magnéto structurales des matériaux (PMSM)

Date de dépôt :

2024-11-23T22:03:04Z
2024-12-04T09:14:10Z