Glass sheet with a high level of infrared radiation transmission

摘要

The invention relates to a glass sheet with a high level of infrared radiation transmission, that can be used especially in a tactile tablet, panel or screen. More precisely, the invention relates to a glass sheet having a composition comprising, as a content expressed in total weight percentages of glass: SiO2 55-78%; AI2O3 0-18%; B2O3 0-18%; Na2O 5-20%; CaO 0-15%; MgO 0-10%; K2O 0-10%; BaO 0-5%; total iron (expressed in the form of Fe2O3) 0.002-0.06%; and a chromium content (expressed in the form of Cr2O3) of between 0.002 and 0.06%.

主权项

1. A glass sheet having a composition which comprises, in a content expressed as percentages by total weight of the glass:SiO255-78% Al2O30-18%B2O30-18%Na2O5-20%CaO0-15%MgO0-10%K2O0-10%BaO 0-5%Total iron (expressed in the form of Fe2O3)0.002-0.06%;   and
chromium (expressed in the form of Cr2O3) ranging from 0.002% to 0.06%, wherein the composition comprises an Fe2+ (expressed in the form of FeO) content of less than 5 ppm and a coefficient of absorption at a wavelength of 1050 nm of less than or equal to 1 m−1.