Method of producing glass substrates with improved long-term rigidity at elevated temperatures

US5716424A · kind A · utility

Assignee

• Institut fuer Neue Materialien gemeinnuetzige GmbH · DE

Inventors

• Martin Mennig · Idar-Oberstein, DE
• Gerhard Jonschker · Friedrichsthal, DE
• Helmut Schmidt · Riegelsberg, DE

Key dates

• Filing date: Dec 9, 1994
• Grant date: Feb 10, 1998
• Expiry date: Dec 9, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2218/113
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Described is a process for the manufacture of glass substrates with improved long-term stability at raised temperatures, in which process a glass substrate is provided with a coating, this coating being prepared from a composition, which was obtained through hydrolysis and condensation of a compound that was dissolved in a solvent and belonged to at least one element from the group Si, Al, Ti and Zr and/or a suitable precondensate, optionally in combination with compounds, which are soluble in the reaction medium, of at least one element from the group of alkali metals, alkali earth metals, and boron. After the coating composition is deposited, the coating obtained thus is heat treated. The process is characterized in that the coating is not completely compacted.