Process for the production of curve glazing with a high transmittance in the visible spectral range and a high reflectance for thermal radiation

US4919778A · kind A · utility

Assignee

• Leybold-Heraeus GmbH · DE

Inventors

• Anton Dietrich · Fontnas, CH
• Klaus Hartig · Ronneburg, DE
• Joachim Szczyrbowski · Goldbach, DE

Key dates

• Filing date: May 19, 1989
• Grant date: Apr 24, 1990
• Expiry date: May 19, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C17/3689
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A system of layers is built up on substrates of mineral glass in the following order: first layer: an oxide from the group, stannic oxide, silicon dioxide, aluminum oxide, tantalum oxide, zirconium oxide, or their mixed oxides; second layer: a metal from the group, tantalum, tungsten, nickel, iron; third layer: silver or a silver alloy containing at least 50 weight-percent of silver; fourth layer: a metal from the group, tantalum, tungsten, nickel, iron or their alloys; fifth layer: an oxide from the group, stannic oxide, silicon dioxide, aluminum oxide, tantalum oxide, zirconium oxide or their mixed oxides. After that, the substrate with all the coating layers is heated to the softening temperature of the glass in an oxidizing atmosphere and bent to the final shape.