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    Preparation and photoluminescence of Eu-doped oxyfluoride borosilicate glass ceramics

    Access Status
    Fulltext not available
    Authors
    XIN, F.
    ZHAO, S.
    XU, S.
    Jia, Guohua
    DENG, D.
    WANG, H.
    HUANG, L.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    XIN, F. and ZHAO, S. and XU, S. and Jia, G. and DENG, D. and WANG, H. and HUANG, L. 2012. Preparation and photoluminescence of Eu-doped oxyfluoride borosilicate glass ceramics. Journal of Rare Earths. 30 (1): pp. 6-9.
    Source Title
    Journal of Rare Earths
    DOI
    10.1016/S1002-0721(10)60628-X
    ISSN
    1002-0721
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/45760
    Collection
    • Curtin Research Publications
    Abstract

    Eu-doped transparent oxyfluoride borosilicate glass ceramics containing Ba2GdF7 nanocrystals were prepared by controlling crystallization of melt-quenched glass fabricated under a reductive atmosphere. In the oxyfluoride borosilicate glass ceramics, the mean crystal size of Ba2GdF7 nanocrystals was about 30 nm, which could be observed by X-ray diffraction (XRD) and transmission electron microscopy analysis. The photoluminescence spectra of the samples excited at 392 nm showed that, besides the characteristic sharp emissions of Eu3+ ions, a very intense broadband emission of Eu2+ ions centered at 450 nm appeared. The photoluminescence intensity of Eu3+ and Eu2+ ions in the glass ceramics was much stronger than that in the as-made precursor. The long decay lifetimes of Eu3+ and Eu2+ ions evidenced the partitions of Eu3+ and Eu2+ ions into the Ba2GdF7 nanocrystals. The energy transfer from Gd3+ ions to Eu3+ and Eu2+ ions was confirmed by the excitation and emission spectra.

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