Glass manufacturing – Processes – Devitrifying glass or vitrifying crystalline glass
Reexamination Certificate
2011-06-14
2011-06-14
Daniels, Matthew J (Department: 1741)
Glass manufacturing
Processes
Devitrifying glass or vitrifying crystalline glass
C065S033100, C501S002000
Reexamination Certificate
active
07958746
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 SiO2, 5-50% by weight of Al2O3and 10-80% by weight of at least one oxide selected from the from the group formed by Y2O3, Lu2O3, Sc2O3, Gd2O3, Yb2O3, Ce2O3, as well as 0.1-30% by weight of at least one oxide selected from the group formed by B2O3, Th2O3, and oxides of the lanthanoids, except Lu2O3, Gd2O3, Yb2O3, Ce2O3. 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.
REFERENCES:
patent: 3809543 (1974-05-01), Gaskell et al.
patent: 4740403 (1988-04-01), Oomen et al.
patent: 4794094 (1988-12-01), Makishima et al.
patent: 6197429 (2001-03-01), Lapp et al.
patent: 6429583 (2002-08-01), Levinson et al.
patent: 6791259 (2004-09-01), Stokes et al.
patent: 6843073 (2005-01-01), Fotheringham et al.
patent: 2002/0062662 (2002-05-01), Fotheringham et al.
patent: 2003/0000151 (2003-01-01), Rosenflanz et al.
patent: 2003/0025449 (2003-02-01), Rossner
patent: 2003/0073563 (2003-04-01), Brodkin et al.
patent: 2004/0148870 (2004-08-01), Celikkaya et al.
patent: 2005/0103056 (2005-05-01), Fotheringham et al.
patent: 2006/0181196 (2006-08-01), Peuchert et al.
patent: 102004048041.9 (2004-10-01), None
patent: 102004048041 (2006-06-01), None
patent: 1 245 548 (2002-10-01), None
patent: 1 642 869 (2006-04-01), None
patent: 2 814 457 (2002-03-01), None
patent: 4-119941 (1992-04-01), None
patent: 2002-173337 (2002-06-01), None
patent: 2002-531955 (2002-09-01), None
patent: 2005-29431 (2005-02-01), None
Shunsuke Fujita et al., YAG glass-ceramic phosphor for white LED (I): background and development, Sep. 2004, vol. 65th, No. 3, p. 1286.
Hoppe Bernd
Letz Martin
Seneschal-Merz Karine
Siebers Friedrich
Sprenger Dirk
Belyaev Yana
Daniels Matthew J
Harness & Dickey & Pierce P.L.C.
Schott AG
LandOfFree
Method for producing a glass ceramic having a garnet phase does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing a glass ceramic having a garnet phase, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing a glass ceramic having a garnet phase will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2729364