Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Reexamination Certificate
2005-09-27
2005-09-27
Brunsman, David (Department: 1755)
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
C501S138000, C501S139000, C361S321400, C361S321500, C428S471000, C428S697000, C343S7000MS, C343S785000
Reexamination Certificate
active
06949487
ABSTRACT:
It is an object of the invention to provide a dielectric ceramic composition which enables its firing temperature to be lowered and which has an excellent electrical properties, particularly temperature dependence of resonance frequencies. A dielectric ceramic composition according to the invention comprises an oxide of a barium titanate family having a composition formula represented as BaTixO2x+1(3.5≦x≦5.0); a first chemical element group consisting of at least one kind of alkaline-earth metals, silicon, zinc, aluminium, titanium, copper, bismuth and molybdenum; and a second chemical element group consisting of at least one kind of alkali metals and boron. A weight ratio of a total of each chemical element in the first and second chemical element groups to the oxide (the total of each chemical element/the oxide) is between 45/55 and 65/35 inclusive when the ratio is determined by converting said each chemical element to its oxide. A weight ratio of the second chemical element group to the first chemical element group (the second chemical element group/the first chemical element group) is between 0.01 and 0.10 inclusive when the ratio is determined by converting said each chemical element to its oxide.
REFERENCES:
patent: 5378663 (1995-01-01), Abe et al.
patent: 5635433 (1997-06-01), Sengupta
patent: 6613705 (2003-09-01), Feltz et al.
patent: 6642167 (2003-11-01), Sugimoto et al.
patent: 6797661 (2004-09-01), Mikkenie et al.
patent: 6828266 (2004-12-01), Park et al.
Ito Kazuhiro
Masumura Hitoshi
Brunsman David
Koninklijke Philips Electronics , N.V.
LandOfFree
Dielectric ceramic composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dielectric ceramic composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dielectric ceramic composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3418866