Method for manufacturing optical glasses and colored glasses at low temperatures

US7140202B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Jochen Freund · Stadecken-Elsheim, DE
• Monika Gierke · Wiesbaden, DE
• Uwe Kolberg · Mainz, DE
• Ruediger Hentschel · Bodenheim, DE
• Rolf Clasen · Saarburg, DE

Key dates

• Filing date: Aug 20, 2002
• Grant date: Nov 28, 2006
• Expiry date: Sep 23, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B2201/58
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method for manufacturing optical glasses and colored glasses with the aid of a fluid phase sintering process from a basic material encompassing at least SiO.sub.2 powder as well as additives for reducing the temperature of the fluid phase sintering and/or melting process encompassing the following steps: the starting materials are dissolved in any sequence in a fluid medium to produce a solution as far as is possible and a suspension to the extent that they are not dispersed in solution; a greenbody is produced from the dissolved and dispersed starting materials; the greenbody is dried the dried greenbody is fluid-phase sintered at temperatures below 1200° C., in particular in the temperature range from 600° C. to 1200° C.