LUMINESCENT GLASS-CRYSTAL MATERIAL Russian patent published in 2021 - IPC C03C3/68 

FIELD: optical materials.

SUBSTANCE: invention relates to the field of optical materials science, in particular to luminescent glass-crystal materials. Luminescent sitall contains components at the following ratio, mol. %: SiO₂ 60-65, Al₂O₃ 14-18, Li₂O 10-13, Р₂О₅ 1-5, MgO 1-2.5, ZnO 0.1-0.5, CaO 0.2-1, BaO 0.5-2, TiO₂ 1-4, ZrO₂ 0.5-2.5, As₂O₃ 0.1-0.5, Sb₂O₃ 0.1-0.5, Nd₂O₃ 0.1-3 (over 100%).

EFFECT: invention makes it possible to obtain a sitall with a stable value of the thermal expansion coefficient, close to zero, in a wide temperature range from -100 to +400°C, having luminescence in the near IR region.

1 cl, 4 ex