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. 29, 2009
Filed:
Nov. 30, 2004
Rainer Koeppler, Seligenstadt, DE;
Bodo Kuehn, Gelnhausen, DE;
Waltraud Werdecker, Hanau, DE;
Ulrich Kirst, Mainz, DE;
Walter Lehmann, Leipzig, DE;
Rainer Koeppler, Seligenstadt, DE;
Bodo Kuehn, Gelnhausen, DE;
Waltraud Werdecker, Hanau, DE;
Ulrich Kirst, Mainz, DE;
Walter Lehmann, Leipzig, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
The invention relates to a method for the economic production of a blank for a component made from laser-active quartz glass in any form or dimension. The method comprises the following method steps: a) preparation of a dispersion with a solids content of at least 40 wt. %, comprising SiOnanopowder and doping agents, including a cation of the rare earth metals and transition metals in a fluid, b) granulation by agitation of the dispersion, with removal of moisture to form a doped SiOgranulate of spherical porous granular particles with a moisture content of less than 35 wt. % and a density of at least 0.95 g/cm, c) drying and purification of the SiOgranulate, by heating to a temperature of at least 1000° C. to form doped porous SiOgrains with an OH content of less than 10 ppm and d) sintering or fusing the doped SiOgrains in a reducing atmosphere to give the blank made from doped quartz glass.