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http://hdl.handle.net/10773/6085
Title: | Synthesis and optical properties of a lithium niobiosilicate glass doped with europium |
Author: | 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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/6085 |
DOI: | 10.1016/j.msec.2008.07.031 |
ISSN: | 0928-4931 |
Appears in Collections: | DFis - Artigos I3N-FSCOSD - Artigos |
Files in This Item:
File | Description | Size | Format | |
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MSEC.pdf | versão pdf do editor | 813.09 kB | Adobe PDF |
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