Highly transparent impact-resistant plate laminate comprising at least one plate of lithium -alminium-silicate-glass ceramic und use thereof

摘要

The transparent plate consists of lithium-alumino-silicate-glass ceramic with a composition having lithium oxide (3.0-4.5 wt.%), aluminum oxide (18.0-24.0 wt.%), silicon dioxide (55.0-70.0 wt.%), titanium dioxide (0.01-2.3), zirconium oxide (0.01-2.0 wt.%), titanium dioxide and zirconium oxide (0.5-2.3), tin oxide (0-0.2), magnesium oxide (0-0.8), iron oxide (40-130 ppm) and arsenic trioxide (0.3-0.9 wt.%) as chemical refining agents, barium oxide (0-3 wt.%), sodium oxide (0-1.5 wt.%) and zinc oxide (0-2.5 wt.%). The thickness of the plate is 6-12 mm. The transparent plate consists of lithium-alumino-silicate-glass ceramic with a composition having lithium oxide (3.0-4.5 wt.%), aluminum oxide (18.0-24.0 wt.%), silicon dioxide (55.0-70.0 wt.%), titanium dioxide (0.01-2.3), zirconium oxide (0.01-2.0 wt.%), titanium dioxide and zirconium oxide (0.5-2.3), tin oxide (0-0.2), magnesium oxide (0-0.8), iron oxide (40-130 ppm) and arsenic trioxide (0.3-0.9 wt.%) as chemical refining agents, barium oxide (0-3 wt.%), sodium oxide (0-1.5 wt.%) and zinc oxide (0-2.5 wt.%). The thickness of the plate is 6-12 mm. The brightness value for transmitting standard light is under 2[deg] -observation Y(A/2) in a thickness of the disc >= 89. The thermal coefficient of the disc is -0.05-0.1 x 10 -> 6>/K. Independent claims are included for: (1) a method for the production of a transparent plate; and (2) a transparent plate laminate.