Eu3+ as a spectroscopic probe in phosphors based on spherical fine particle gadolinium compounds
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Data
2001-11-01
Autores
Pires, Ana Maria [UNESP]
Davolos, Marian Rosaly [UNESP]
Stucchi, Elizabeth Berwerth [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
This work reports on the luminescence spectroscopy sensitivity in the determination of the phase purity in gadolinium compounds using Eu3+ as a probe. Cubic Gd2O3 and hexagonal Gd2O2S doped with Eu3+ spherical fine particles were obtained from doped gadolinium basic carbonates with morphological control and were also characterized by IR and XRD. Doped samples present Eu3+ characteristic transitions, with specific energy positions related to each phase. Emission and excitation spectra patterns were established for oxide and oxysulfide compounds, then oxysulfate and oxide impurities generated during oxysulfide preparation were monitored. From emission spectra some experimental intensity parameters were also calculated. All spectroscopic results reflect the presence or not of impurities in all compounds. (C) 2001 Elsevier B.V. Ltd. All rights reserved.
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gadolinium, europium probe, luminescence
Como citar
International Journal of Inorganic Materials. Oxford: Elsevier B.V., v. 3, n. 7, p. 785-790, 2001.