Preparation of a synthetic quartz glass grain

US10618833B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Martin Arndt · Aachen, DE
• 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 14, 2020
• Expiry date: Dec 16, 2036

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 the preparation of a quartz glass grain comprising the process steps i.) Providing a silicon dioxide granulate from a pyrogenically produced silicon dioxide powder, ii.) Making a glass melt out of silicon dioxide granulate, iii.) Making a quartz glass body out of at least part of the glass melt and iv.) Reducing the size of the quartz glass body to obtain the quartz glass grain. The invention further relates to a quartz glass grain which is obtainable by this process. The invention further relates to opaque quartz glass bodies, which are obtainable by further processing of the quartz glass grain.