Effect of induced crystallization in rare-earth doped lithium borate glass

Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic

“…Under 345 nm excitation, the coordinates x = 0.677 and y = 0.274 corresponded to the region of red Eu 3+ luminescence, but after glass ceramization (in air or reducing atmosphere), these changed to x = 0.404 and y = 0.244 as a consequence of the Eu 2+ blue luminescence. The photoluminescence quantum efficiency was about 16% for the glass, but decreased to only 4% for the glass-ceramic due to the scattering losses [13].…”

“…Under 345 nm excitation, the coordinates x = 0.677 and y = 0.274 corresponded to the region of red Eu 3+ luminescence, but after glass ceramization (in air or reducing atmosphere), these changed to x = 0.404 and y = 0.244 as a consequence of the Eu 2+ blue luminescence. The photoluminescence quantum efficiency was about 16% for the glass, but decreased to only 4% for the glass-ceramic due to the scattering losses [13]. The PL spectra of the initial glass showed weak Eu 3+ -related luminescence peaks at 578, 592, and 620 nm assigned to the 5 D 0 → 7 F 0-3 radiative transitions [25], which increased after glass ceramization due to the partial absorption of the UV-blue luminescence of the Eu 2+ ions (see below).…”

“…Nevertheless, fluorozirconate glass synthesis is performed at relatively high temperature and controlled atmosphere, and therefore other glass matrix options have been considered such as such as borate glasses. The synthesis and crystallization properties of barium borate glass-ceramics in the BaO-B 2 O 3 system have been studied, and their structural and optical properties related to the borate nanocrystals (BaB 2 O 4 , BaB 4 O 7 , Li 2 B 4 O 7 ) [12][13][14][15] and BaCl 2 [16,17] nanocrystals have been investigated.…”

Suitability of Lock-in Infrared Thermography for Luminescent Glass Development

“…For the optically activated sample sets, a Li2O concentration of 25 mol% is used. The glass components are mixed and melted in a platinum gold crucible (Pt/Au 95/5) at 1000 °C for approximately 3 h. For further details on the glass preparation, the reader is referred to [8,9].…”

Crystallization of (GeSe2)0.3(Sb2Se3)0.7 chalcogenide glass - Influence of reaction atmosphere

“…Whereas the influences of e.g. long-term degradation [1][2][3], particle size [4][5][6][7][8] or investigated temperature range (during non-isothermal measurements determined by the heating rate) [9][10][11] on the DSC/DTA crystallization measurements of chalcogenide glasses are relatively well documented, the influence of the reaction atmosphere has been neglected for the past decades.…”