title: Tailoring the Composition of Eu3+-Doped Y3NbO7Niobate: Structural Features and Luminescent Properties Induced by Spark Plasma Sintering.
abstract: The defective fluorite-related Y3NbO7host lattice was doped with Eu3+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 Y3NbO7solid 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 Y3NbO7ionic conductive matrix.
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: Ka-Young
authors.initials: KY
authors.lastname: Kim
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: U-Chan
authors.initials: UC
authors.lastname: Chung
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: Brice
authors.initials: B
authors.lastname: Mutulet
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: François
authors.initials: F
authors.lastname: Weill
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Demourgues
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: Julie
authors.initials: J
authors.lastname: Rossit
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Heintz
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: Amélie
authors.initials: A
authors.lastname: Veillere
authors.affiliation: CNRS, ‡Univ. Bordeaux, and §Bordeaux INP, ICMCB, UPR9048 , F-33600 Pessac, France.
authors.forename: Véronique
authors.identifier: http://orcid.org/0000-0002-2832-3958
authors.initials: V
authors.lastname: Jubera