Process for producing SiO2-TiO2 glasses having a low coefficient of thermal expansion

US6796143B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Rolf Clasen · Saarburg, DE
• Helmut Mangold · Rodenbach, DE
• Klaus Deller · Großkrotzenburg, DE
• Gerrit Schneider · Hanau, DE
• Christine Wagner · Riegelsberg, DE

Key dates

• Filing date: Feb 28, 2001
• Grant date: Sep 28, 2004
• Expiry date: May 21, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2201/42
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

SiO2—TiO2 glasses having a low coefficient of thermal expansion are produced by a molding being produced that consists of SiO2 powder, SiO2—TiO2 powder or TiO2 powder and that contains by way of secondary component a titanium-containing component which is converted into amorphous TiO2.