1. Pre-crystallization heat treatment and infrared luminescence enhancement in Ni2+-doped transparent glass-ceramics
- Author
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Angelo Monguzzi, E. S. Ignat’eva, Vladimir N. Sigaev, Valery M. Mashinsky, Nikita V. Golubev, Roberto Lorenzi, Е.О. Kozlova, Alberto Paleari, Golubev, N, Ignat'Eva, E, Mashinsky, V, Kozlova, Е, Sigaev, V, Monguzzi, A, Paleari, A, and Lorenzi, R
- Subjects
Luminescence ,Materials science ,Analytical chemistry ,Nucleation ,chemistry.chemical_element ,Nanocrystal ,02 engineering and technology ,01 natural sciences ,Fluorescence spectroscopy ,law.invention ,Differential scanning calorimetry ,law ,0103 physical sciences ,Materials Chemistry ,Ga 2 O 3 ,Gallium ,Crystallization ,Absorption (electromagnetic radiation) ,010302 applied physics ,Glass-ceramic ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,chemistry ,Ceramics and Composites ,Light emission ,0210 nano-technology - Abstract
We report on design and fabrication of Ni 2+ -doped glass-ceramics from a low-alkali optical glass in Li 2 O-Na 2 O-Ga 2 O 3 -SiO 2 -GeO 2 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 Ni 2+ 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.
- Published
- 2019
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