Method for the forming of glass or glass ceramics

US7216510B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Thorsten Doehring · Mainz, DE
• Ralf Jedamzik · Griesheim, DE
• Hauke Esemann · Wörrstadt, DE
• Eva Hoelzel · Ingelheim am Rhein, DE

Key dates

• Filing date: Aug 7, 2003
• Grant date: May 15, 2007
• Expiry date: Mar 16, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G21K2201/067
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for forming glass or glass ceramics is disclosed, wherein a glass ceramics form (12) is made from a starting glass by molding, which is transformed by a heat treatment into a keatite glass ceramic comprising predominantly keatite mixed crystals. With such a keatite glass ceramics form (12) formed bodies can be prepared from blank parts by sagging under gravity force at a temperature above the glass transition temperature of the blank part (14) (FIG. 1).