Tailoring the Composition of Eu(3+)-Doped Y3NbO7 Niobate: Structural Features and Luminescent Properties Induced by Spark Plasma Sintering. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Inorganic Chemistry Année : 2017

Tailoring the Composition of Eu(3+)-Doped Y3NbO7 Niobate: Structural Features and Luminescent Properties Induced by Spark Plasma Sintering.

Résumé

The defective fluorite-related Y3NbO7 host lattice was doped with Eu(3+) ions to understand the influence of spark plasma sintering (SPS) process on this host lattice. The intrinsic disorder due to the occurrence of oxygen vacancies results in amorphous-type responses of the luminescent cations, and the spectral distribution varies as a function of the niobium content. Two spectral fingerprints of europium emissions were clearly enhanced. The correlation between luminescence, X-ray diffraction, and electron diffraction characterizations shows the existence of local inhomogeneity. Indeed, the particular nonequilibrium sintering conditions allowed pointing out a lack of miscibility within the Y3NbO7 solid solution domain. Thus, the SPS pellet is a composite of two extreme compositions. This phase demixing is mainly induced by the pressure coupled with a current effect that makes possible ionic migration in this Y3NbO7 ionic conductive matrix.

Domaines

Matériaux
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Dates et versions

hal-01520638 , version 1 (11-05-2017)

Identifiants

Citer

Ka-Young Kim, U-Chan Chung, Brice Mutulet, François Weill, Alain Demourgues, et al.. Tailoring the Composition of Eu(3+)-Doped Y3NbO7 Niobate: Structural Features and Luminescent Properties Induced by Spark Plasma Sintering.. Inorganic Chemistry, 2017, 56 (8), pp.4495-4504. ⟨10.1021/acs.inorgchem.7b00088⟩. ⟨hal-01520638⟩
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