Increase in silicon content in the preparation of quartz glass
AssigneeHeraeus Quarzglas GmbH & Co. KG
InventorsNigel Robert Whippey, Marcus Constantin Göbel, Boris Gromann, Gerrit Scheich
Life of this patent
Estimating the term…
Abstract
A quartz glass body and a process for the preparation of a quartz glass body is disclosed. In one aspect, the process includes providing a silicon dioxide granulate from a pyrogenic silicon dioxide powder, making a glass melt out of the silicon dioxide granulate and making a quartz glass body out of at least part of the glass melt. In at least one process a silicon component different from silicon dioxide is added. One aspect further relates to a quartz glass body which is obtainable by this process. A light guide, an illuminant and a formed body, are each obtainable by further processing of the quartz glass body.
Claims27
1-26. (canceled)
A process for the preparation of a quartz glass body comprising:
- providing a silicon dioxide granulate, wherein this provision comprises:
- providing a pyrogenic silicon dioxide powder;
- and
- processing the silicon dioxide powder to obtain a silicon dioxide granulate,
- wherein the silicon dioxide granulate has a greater particle diameter than the silicon dioxide powder;
- making a glass melt out of the silicon dioxide granulate;
- and
- making a quartz glass body out of at least part of the glass melt;
- wherein in at least one of the process steps a silicon component different from silicon dioxide is added.
A use of a silicon component to reduce the OH content of quartz glass bodies, wherein the silicon component is different from silicon dioxide and is selected from the group consisting of silicon, silicon-hydrogen compounds, silicon-oxygen compounds or silicon-hydrogen-oxygen compounds.
A use of a silicon component to prepare products comprising quartz glass selected from the group consisting of a light guide, an illuminant and a formed body, wherein the silicon component is different from silicon dioxide and is selected from the group consisting of silicon, silicon-hydrogen compounds, silicon-oxygen compounds or silicon-hydrogen-oxygen compounds.
Dependencies are inferred from the claim text.