Process for making glass panes with a high transmissivity in the visible spectrum and a high reflexivity for infrared light, and panes made by this process

摘要

A process for the production of glass sheets with high transmissivity in the visible spectrum and high reflectivity for infra-red light and low surface resistance wherein a layer system in the following sequence is built up on mineral glass substrates: layer 1: oxide from the group comprising tin oxide, silicon dioxide, aluminium oxide, tantalum oxide and zirconium oxide or mixed oxides thereof layer 2: alloy comprising 80% by weight of nickel and 20% by weight of chromium layer 3: silver or a silver alloy containing at least 50% by weight of silver layer 4: alloy comprising 80% by weight of nickel and 20% by weight of chromium layer 5: oxide from the group comprising tin oxide, silicon dioxide, aluminium oxide, tantalum oxide and zirconium oxide or mixed oxides thereof. The substrate, together with the entire sequence of layers, is warmed to the softening point of the glass and bent into the final shape. IMAGE