Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 523, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2019.119579
Keywords
Self-crystallization; Temperature; Ba2LaF7; Glass-ceramics; FTIR; Luminescence
Funding
- National Natural Science Foundation of China [11774138, 11664022]
- Foundation of Yunnan Province [2016FA021, 2016FB081]
- Kunming University of Science and Technology [KKSY201632046]
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The self-crystallization phenomenon in glass can provide low-phonon energy environment for the up-conversion of luminescence centers. Nevertheless, the crystallization mechanism is not clear, hence the effect of temperature on the self-crystallization of Ba2LaF7: Er3+/Yb3+ glass-ceramics via adjusting its melting temperature has investigated. The self-crystallization fraction of Ba2LaF7 has decreased with the increase in melting temperature. The Fourier transforms infrared spectra, X-ray Fluorescence analysis and differential thermal analysis revealed that the increase in temperature makes the Si-O bond longer in the glass, resulting in the increase of activation energy for crystallization instead of precipitating the crystals.
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