Method of producing a quartz glass crucible

US6755049B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Gabriele Korus · Leipzig, DE
• Hilmar Laudahn · Bitterfeld-Wolfen, DE
• Martin Arndt · Aachen, DE
• Udo Gertig · Goldbach, DE

Key dates

• Filing date: Jul 10, 2001
• Grant date: Jun 29, 2004
• Expiry date: Feb 8, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C10/0009
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Known is a method of producing a quartz glass crucible in which a crucible base body is provided at least in part with an inner layer in which the formation of cristobalite is induced by using a crystallization promoter. On the basis thereof, in order to provide an inexpensive method of producing a quartz glass crucible with reproducible characteristics for long service lives, it is suggested according to the invention that the crystallization promoter and a reducing substance are introduced into the inner layer.