GUENÉ-GIRARD, Simon; JUBERA, Veronique; VIERS, Lucas; BOULESTEIX, Rémy; MAITRE, Alexandre; HEINTZ, Jean-Marc

doi:10.1016/j.ceramint.2020.02.190

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GUENÉ-GIRARD, Simon
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

JUBERA, Veronique
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

VIERS, Lucas
IRCER - Axe 4 : céramiques sous contraintes environnementales [IRCER-AXE4]

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Article de revue

Ce document a été publié dans

Ceramics International. 2020-02, vol. 46, n° 16, Part B, p. 26361-26367

Elsevier

Résumé en anglais

Rare earth niobates (RE3NbO7) are materials that present interesting magnetic [[1], [2], [3]], dielectric [4,5], photocatalytic [6,7], electric or ionic conductivity [[8], [9], [10], [11], [12]] and optical properties [13,14]. Such properties could be related to the crystal structures of RE3NbO7 that exists in three different crystalline forms depending on the ionic radii of the rare earth atoms [3,[15], [16], [17], [18], [19]]. Orthorombic (Pnma) and cubic fluorite pyrochlore (Fdm) structures are found for the largest cations, while the smallest radii RE (Dy, Ho, Er, Tm, Eu, Yb …) crystallize into a defect cubic fluorite structure (Fmm) [15,17]. Rare earth and niobium atoms are statistically distributed on cationic sites, as well as oxygen vacancies on anionic sites. This relative disordered structure leads to peculiar optical properties with a significant broadening of the 4f-4f transitions observed in an Eu-doped Y3NbO7 compound...< Réduire

Mots clés en anglais

Phosphate glass

Glass-ceramic

Yb3+

Luminescence

XRD

Y3NbO7

Ceramics

Sintering

Niobate

Densification

Co-precipitation

liquid route synthesis

DOI

http://dx.doi.org/10.1016/j.ceramint.2020.02.190

Project ANR

Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026