Tarafder, Anal and Molla, Atiar Rahaman and Karmakar, Basudeb (2010) Processing and Properties of Eu3+-Doped Transparent YAG (Y(3)Al(5)O(12)) Nanoglass-Ceramics. Journal of the American Ceramic Society, 93 (10). pp. 3244-3251. ISSN 0002-7820

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An Eu3+-doped novel mother glass in the K(2)O-SiO(2)-Y(2)O(3)-Al(2)O(3) (KSYA) system was prepared by the melt-quench technique. The transparent Y(3)Al(5)O(12) (YAG) glass-ceramics were derived from this glass by a controlled crystallization process. The formation of YAG crystal phase, size and morphology with the progression of heat treatment was examined by X-ray diffraction (XRD), transmission electron microscopy, field-emission scanning electron microscopy, and Fourier transformed infrared reflectance spectroscopy. The crystallite sizes obtained from XRD are found to increase with heat-treatment time and vary in the range of 35-45 nm. The photoluminescence spectra of Eu3+ ions exhibit emission transitions of 5D(0)-> 7F(j) (j=0, 1, 2, 3, and 4) and its excitation spectra show a charge transfer band around 280 nm. From these emissions, the site symmetry in the vicinity of Eu3+ ions has been found to be C(s) or lower than C(s) in the nanoglass-ceramics. Absorption and fluorescence spectra reveal that the Eu3+ ions are entering into the YAG nanocrystals of the glass-ceramics. The present study indicates that the incorporation of Eu3+ ions into the YAG crystal lattice enhance the fluorescence performance of the nanoglass-ceramics. We believe that this work would generate new avenues in the exploration of YAG nanoglass-ceramics in particular and other glass-ceramics of very high-temperature melting crystals in general.

Item Type: Article
Subjects: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Feb 2012 10:51
Last Modified: 26 Mar 2012 09:50
URI: http://cgcri.csircentral.net/id/eprint/932

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