Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1995-09-08
1998-04-28
Le, H. Thi
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
313463, 313483, 313502, 313503, 427215, 427219, 428329, 428331, 428404, 428917, B32B 516, H01J 2910, B05D 700
Patent
active
057442339
ABSTRACT:
The invention relates to a method of coating luminescent powders with a coating which comprises silicon dioxide, which method is characterized in that in a first step luminescent particles are dispersed in a solution containing one or more metallo-organic compounds of silicon and, optionally, metallo-organic compounds of further elements in a hydrous solvent mixture having a pH-value of 1<pH 5, whereafter the metallo-organic compounds are hydrolysed by adding ammonia. A further aspect of the invention relates to a luminescent powder having a coating composed of silicon oxide and at least one oxide of a further element selected from the group formed by aluminum, barium, lead, boron, magnesium, titanium, zinc, zirconium, cobalt, copper and iron. Another aspect of the invention relates to a coated object, such as a fluorescent screen or display screen for a cathode ray tube or lamp or for other electrical discharge tubes or lamps, in particular also color television display screens, which is coated with a luminescent powder coated in accordance with the invention.
REFERENCES:
patent: 4110492 (1978-08-01), Hayman
patent: 4156885 (1979-05-01), Budd
patent: 4902929 (1990-02-01), Toyoda et al.
patent: 5064690 (1991-11-01), Sando et al.
patent: 5098740 (1992-03-01), Tewari
patent: 5185207 (1993-02-01), Furuoka et al.
patent: 5196229 (1993-03-01), Chau
patent: 5262201 (1993-11-01), Chandra et al.
patent: 5369331 (1994-11-01), Mizukami et al.
patent: 5418062 (1995-05-01), Budd
patent: 5439705 (1995-08-01), Budd
Mayr Walter
Opitz Joachim
Le H. Thi
Spain Norman N.
U.S. Philips Corporation
LandOfFree
Method of coating luminescent powders, luminescent powders and c 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 of coating luminescent powders, luminescent powders and c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of coating luminescent powders, luminescent powders and c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1530439