Preparation of a quartz glass body in a melting crucible of refractory metal

US11299417B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Matthias Otter · Hamm, DE
• Walter Lehmann · Leipzig, DE
• Michael Hünermann · Alzenau, DE
• Nils Christian Nielsen · Göllheim, DE
• Nigel Whippey · Seligenstadt, DE
• Boris Gromann · Aschaffenburg, DE
• Abdoul-Gafar Kpebane · Bruchköbel, DE

Key dates

• Filing date: Dec 16, 2016
• Grant date: Apr 12, 2022
• Expiry date: Jan 21, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/57
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a process for preparing a quartz glass body comprising the process steps i.) Providing a silicon dioxide granulate, ii.) Making a glass melt from the silicon dioxide granulate in a melting crucible, and iii.) Making a quartz glass body from at least a part of the glass melt, wherein the melting crucible is comprised in an oven and is made of at least one material comprising tungsten or molybdenum or a combination thereof. The invention further relates to a quartz glass body which can be obtained by this process. Further, the invention relates to a light guide, an illuminant and a formed body, each of which can be obtained by processing the quartz glass body further.