Thermally tempered safety glass used for covers of solar collectors, for photovoltaic cells, for vehicle windscreens and/or for glazing has a porous silicon dioxide layer having a specified refractive index

摘要

Thermally tempered safety glass has a porous silicon dioxide layer having a refractive index of 1.25-1.40. An independent claim is also included for a process for the production of the safety glass comprising coating a standard soda-lime glass with an aqueous coating solution having a pH of 3-8 and containing 0.5-5.0 wt.% [SiO x(OH) y] n particles (where y = 0-4; and x = 0-2) having a particle size of 10-60 nm; drying the coated glass by leaving to stand at room temperature or by drying in an air stream; hardening the glass at at least 600[deg] C for 2-10 minutes; and thermally tempering using a flow of air.