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 Synthesis and optical properties of a lithium niobiosilicate glass doped with europium
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6085

title: Synthesis and optical properties of a lithium niobiosilicate glass doped with europium
authors: Graça, M.P.F.
Valente, M.A.
Silva, C.C.
Peres, M.
Cruz, A.
Soares, M.J.
Neves, A.J.
Monteiro, T.
keywords: Lithium niobate
Europium niobate
Glass–ceramics
Structural properties
Morphological properties
Optical properties
issue date: 30-Apr-2009
publisher: Elsevier
abstract: The sol–gel method was used to prepare a lithium niobiosilicate glass doped with europium ions, 91SiO2–4Li2O–4Nb2O5–1Eu2O3 (% mole). The dried gel was heat-treated between 500 °C and 750 °C and glass ceramics were obtained. X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman studies show that crystallization starts at temperatures above 600 °C. The LiNbO3 and EuNbO4 nanocrystals were found in the heat-treated samples as corroborated by the structural, morphological and optical properties. Room temperature photoluminescence (PL) studies allow us the identification of multiple Eu-related optical centres and the strongest red 5D0 → 7F2 intraionic transitions occur in the samples heat-treated at 600 °C where the LiNbO3 crystal phase was detected.
URI: http://hdl.handle.net/10773/6085
ISSN: 0928-4931
publisher version/DOI: dx.doi.org/10.1016/j.msec.2008.07.031
source: Materials Science and Engineering C
appears in collectionsFIS - Artigos
I3N - Artigos

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