HEAT-RESISTANT GREEN GLASS FOR LIGHT FILTERS Russian patent published in 2014 - IPC C03C3/87 C03C4/02 

FIELD: chemistry.

SUBSTANCE: invention relates to glass industry, particularly a composition for heat-resistant green glass, intended for making light filters with an irregular curved surface, coated with a current-conducting layer of a film used in fifth-generation aircraft lights. The heat-resistant green glass for light filters contains SiO₂, K₂O, Li₂O, CuO, Cr₂O_3, SrO, BaO, Bi₂O₃, P₂O₅, ZrO₂ with the following ratio of components, wt %: SiO₂ 72.0-75.0; Li₂O 1.5-3.0; ZrO₂ 1.0-2.0; K₂O 5.0-7.0; BaO 75.0-9.5; P₂O₅ 1.0-1.5; Bi₂O₃ 2.0-3.0; SrO 2.0-4.0; CuO 1.5-2.0; Cr₂O₃ 0.1-0.2. The technical result of the invention is that the disclosed heat-resistant green glass has a high integrated optical transmission coefficient which, after application of a current-conducting SnO₂ coating, provides high brightness of the signal and chromaticity coordinates which meet International Commission on illumination requirements.

EFFECT: good processing properties of the disclosed glass composition (low melting and production temperature) enable to use the disclosed composition in making light filters with an irregular curved surface by moulding.

1 dwg, 2 tbl