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. 23, 2019
Filed:
May. 23, 2017
Heraeus Quarzglas Gmbh & Co. KG, Hanau, DE;
HERAEUS QUARZGLAS GMBH & CO. KG, Hanau, DE;
Abstract
A method for producing a pore-containing opaque quartz glass includes: (a) producing porous SiOgranulate particles from synthetically produced SiO, (b) thermally densifying the SiOgranulate particles to form partly densified SiOgranulate particles, (c) forming a dispersion from the partly densified SiOgranulate particles, (d) comminuting the partly densified SiOgranulate particles to form a slip containing comminuted SiOgranulate particles, (e) shaping the slip into a shaped body and forming a porous SiOgreen body with a green density rG, and (f) sintering the SiOgreen body into opaque quartz glass. To produce opaque quartz glass that is also suited for the use of spray granulate, during step (b), partly densified SiOgranulate particles are produced with a specific surface BET-(A) between 0.025 and 2.5 m/g, and during step (d), comminuted SiOgranulate particles are produced with a specific surface BET-(B) between 4 and 10 m/g.