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:
Jun. 14, 2011
Filed:
Jun. 04, 2007
Karine Seneschal-merz, Mainz, DE;
Bernd Hoppe, Ingelheim, DE;
Dirk Sprenger, Stadecken-Elsheim, DE;
Friedrich Siebers, Nierstein, DE;
Martin Letz, Mainz, DE;
Thilo Zachau, Buerstadt-Riedrode, DE;
Karine Seneschal-Merz, Mainz, DE;
Bernd Hoppe, Ingelheim, DE;
Dirk Sprenger, Stadecken-Elsheim, DE;
Friedrich Siebers, Nierstein, DE;
Martin Letz, Mainz, DE;
Thilo Zachau, Buerstadt-Riedrode, DE;
Schott AG, Mainz, DE;
Abstract
The invention proposes a method for producing glass ceramics which is particularly well suited as light conversion material, especially for down conversion. One initially produces a starting glass, containing (on an oxide basis) 5-50% by weight of SiO, 5-50% by weight of AlOand 10-80% by weight of at least one oxide selected from the from the group formed by YO, LuO, ScO, GdO, YbO, CeO, as well as 0.1-30% by weight of at least one oxide selected from the group formed by BO, ThO, and oxides of the lanthanoids, except LuO, GdO, YbO, CeO. Thereafter, the material is heated up for ceramization at a heating rate of at least 100 K/min to a temperature in the range of between 1000° C. to 1400° C. until crystallites are formed that contain a garnet phase. Thereafter, the material is cooled down to room temperature. Alternatively, controlled cooling-down from the molten state is possible.