The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2014
Filed:
Sep. 14, 2010
Anke Schuster, Halle, DE;
Rene Sowa, Pouch, DE;
Martin Trommer, Bitterfield-Wolfen, DE;
Udo Peper, Halle/Saale, DE;
Anke Schuster, Halle, DE;
Rene Sowa, Pouch, DE;
Martin Trommer, Bitterfield-Wolfen, DE;
Udo Peper, Halle/Saale, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
In a known process for producing a quartz glass cylinder, a porous soot tube, which is sintered to form the quartz glass cylinder, is produced by depositing SiOparticles on an outer cylindrical surface of a support, which rotates about the longitudinal axis thereof and has a layer of silicon carbide (SiC layer). In order on this basis to specify a support having a high resistance to fracture, which firstly can easily be removed and which secondly presents a low risk of contamination for the soot body, the invention proposes that the SiC layer is treated at a high temperature in an oxygen-containing atmosphere before the SiOparticles are deposited, in such a manner that an SiOprotective layer having a thickness of at least 0.1 μm is produced by oxidation.