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:
Dec. 30, 2014
Filed:
Sep. 01, 2010
Waltraud Werdecker, Hanau am Main, DE;
Gerrit Scheich, Obertshausen, DE;
Christian Schenk, Ingelheim, DE;
Waltraud Werdecker, Hanau am Main, DE;
Gerrit Scheich, Obertshausen, DE;
Christian Schenk, Ingelheim, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
In a known method, a SiOslip layer is applied to a basic quartz glass body by means of spraying on an SiOslip, the slip layer is dried and sintered to form an SiO-containing functional layer. In order to permit the reproducible production of a functional quartz glass layer, even in the case of surfaces that are curved or inclined with respect to the vertical, having high layer thicknesses which satisfy high requirements on the layer homogeneity, the invention proposes that the slip contain the following components in a dispersion liquid: splintery, amorphous SiOgranules having a gain size distribution having a Dvalue in the range of 3 μm to 30 μm and having a proportion by weight of at least 10% by weight, based on the total solids content; spherical, amorphous SiOparticles having a particle size distribution having a Dvalue in the range of 1 μm to 50 μm and having a proportion by weight of at least 30% by weight, based on the total solids content; SiOnano particles having particle sizes of less than 100 nm and having a proportion by weight between 0.2% and 10% by weight, based on the total solids content; and a non-ionic, alkali-free surfactant having a proportion in the range of 0.005 to 0.5%, based on the volume of the dispersion liquid.