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Synthesis and properties of SrBi 2 Ta 2 O 9-based glass-ceramics modified with Eu 3+
A TARAFDER, A R MOLLA, , B KARMAKAR
Published in -
2012
Volume: 95
   
Issue: 6
Pages: 1851 - 1857
Abstract
The Eu 3+-doped novel precursor glass in the K 2O-SiO 2-SrO-Bi 2O 3-Ta 2O 5 system was prepared using the melt-quench technique. The transparent SrBi 2Ta 2O 9 (SBT) glass-ceramic nanocomposites were derived from this glass using a controlled crystallization process. The formation of SBT crystal phase, size, and morphology with increase in heat-treatment time was examined using X-ray diffraction, field emission scanning electron microscopy, and fourier transform infrared transmission spectroscopy. Vicker's hardness study indicates marked improvement of hardness in the glass-ceramics compared to precursor glass. The photoluminescence spectra of Eu 3+ ions exhibit emission transitions of 5D 0→ 7F j (j = 0, 1, 2, 3, and 4) and its excitation spectra show an intense absorption band at 467 nm. These spectra reveal that the Eu 3+ ions are gradually entering into the SBT nanocrystals present in the glass-ceramics. This study indicates that the incorporation of Eu 3+ ions into SBT crystal lattice enhances the photoluminescence performance of the glass-ceramics by two-fold. It is believed that this work would generate significant impact in the exploration of SBT glass-ceramic nanocomposites. © 2012 The American Ceramic Society.
About the journal
JournalJournal of the American Ceramic Society
Publisher-
ISSN0002-7820
Open AccessNo