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:
Mar. 22, 2011
Filed:
Jun. 04, 2007
Karine Seneschal-merz, Mainz, DE;
Bernd Hoppe, Ingelheim, DE;
Dirk Sprenger, Stadecken-Eisheim, DE;
Martin Letz, Mainz, DE;
Thilo Zachau, Buerstadt-Riedrode, DE;
Friedrich Siebers, Nierstein, DE;
Karine Seneschal-Merz, Mainz, DE;
Bernd Hoppe, Ingelheim, DE;
Dirk Sprenger, Stadecken-Eisheim, DE;
Martin Letz, Mainz, DE;
Thilo Zachau, Buerstadt-Riedrode, DE;
Friedrich Siebers, Nierstein, DE;
Schott AG, Mainz, DE;
Abstract
The invention provides a method for producing a glass ceramic comprising the steps of melting a starting glass that is free from alkali, except for incidental contamination, and that contains at least one garnet-forming agent and at least one oxide of a lanthanoid; grinding the starting glass to produce a glass frit; molding by pressing and sintering the glass frit until at least one garnet phase containing lanthanoids is formed. A glass ceramic produced in this way may contain 5-50 % by weight of SiO, 5-50 % by weight of AlOand 10-80 % by weight of at least one oxide selected 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. Such a glass ceramic is suited especially for down conversion of excitation radiation in the blue and in the UV region of the spectrum.