THERMALLY TEMPERED GLASS COMPRISING A NON-ABRASIVE, POROUS, SIO2 ANTIREFLECTION LAYER

摘要

The invention relates to thermally tempered safety glass comprising a non-abrasive and porous SiO2 layer which is stable during sintering and has a refractive index of between 1.25 and 1.40. The inventive safety glass can be obtained by coating standard soda-lime glass with an aqueous coating solution having a pH value of between 3 and 8 and containing between 0.5 and 5.0 wt. % of [SiOx(OH)y]n particles (0∫y∫ and 0∫x∫2) having a particle size of between 10 and 60 nm, and a surfactant mixture. The coated glass is then dried, thermally hardened at temperatures of at least 600 °C for several minutes, and thermally tempered by a flow of air.