Preparation of a quartz glass body in a multi-chamber oven

US11708290B2 · 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
• Matthias Söhn · Speyer, DE

Key dates

• Filing date: Aug 4, 2020
• Grant date: Jul 25, 2023
• Expiry date: Apr 2, 2041

Classification

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

Abstract

One aspect relates to a process for the preparation of a quartz glass body, including providing a silicon dioxide granulate, wherein the silicon dioxide granulate was made from pyrogenic silicon dioxide powder and the silicon dioxide granulate has a BET surface area in a range from 20 to 40 m2/g, making a glass melt out of silicon dioxide granulate in an oven and making a quartz glass body out of at least part of the glass melt. The oven has at least a first and a further chamber connected to one another via a passage. The temperature in the first chamber is lower than the temperature in the further chambers. On aspect relates to a quartz glass body which is obtainable by this process. One aspect relates to a light guide, an illuminant and a formed body, which are each obtainable by further processing of the quartz glass body.