Ein neues Wärmedämmsystem für Architekturglass

Vacuum coated glass plays an outstanding role for the energy saving of buildings. The basis of such low emissivity coatings is a 10 nm thick silver layer causing an effective reflexion of room temperature radiation. With conventional coatings k‐values of 1,3 W/m²K are realized. In the frame of a research project funded by the BMBF reactive mid frequency sputtering (Leybold TwinMag®) has been introduced for manufacturing of low e glass. The new developed system glass — TiO₂ — ZnO — Ag — NiCrO_x — Si₃N₄ enables a k‐value of 1,1 W/m²K and an improvement of optical properties.