Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 515, Issue -, Pages 42-49Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2019.04.006
Keywords
Glass-ceramics; Luminescence; Nucleation; Crystallization; Nanocrystals; Ga2O3
Funding
- Mendeleev University of Chemical Technology of Russia [023-2018]
- Italian Ministry of University and Research (MIUR) through grant Dipartimenti di Eccellenza-2017 Materials for Energy
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We report on design and fabrication of Ni2+-doped glass-ceramics from a low-alkali optical glass in Li2O-Na2O-Ga2O3-SiO2-GeO2 system by melting technique and subsequent thermally controlled nano-crystallization. The analysis of differential scanning calorimetry, X-ray diffraction, transmission electron microscopy, absorption and fluorescence spectroscopy reveals, for the first time, the real possibility of optimizing the integrated intensity of Ni2+ near-infrared emission through controlled pre-treatments at temperatures of nanophase nucleation, with the enhancement up to a factor of four with respect to gallium germanosilicate glass-ceramics obtained without pre-treatments. Importantly, the effects on the light emission are shown to be related to the influence of pre-treatment on size and size distribution of the gallium oxide nanocrystals which result from subsequent crystallization at higher temperature.
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