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. 24, 2018
Filed:
Sep. 24, 2015
Heraeus Quarzglas Gmbh & Co. KG, Hanau, DE;
Achim Hofmann, Frankfurt, DE;
Thomas Kayser, Leipzig, DE;
Matthias Otter, Münster, DE;
Bodo Kühn, Gelnhausen, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
A method for producing synthetic quartz glass by fusion of SiOgranulate involves synthesizing amorphous SiOprimary particles, granulating the amorphous SiOprimary particles to form an open-pore SiOgranulate, sintering the open-pore SiOgranulate by heating in a sintering atmosphere at a sintering temperature and for a sintering period to form a densified SiOgranulate, and melting the densified SiOgranulate at a melting temperature to form the synthetic quartz glass. To provide an inexpensive production of low-bubble transparent components of quartz glass despite the use of still open-pore SiOgranulate, the sintering atmosphere, sintering temperature and sintering duration are adjusted such that the densified SiOgranulate still comprises open pores but manifests a material-specific infrared transmission Tat a wavelength of 1700 nm. This transmission is in the range of 50-95% of the infrared transmission Tof quartz glass granules of the same material.