Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1997-08-13
1999-02-02
Brunsman, David
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
C04B 35468
Patent
active
058664947
ABSTRACT:
The present invention relates to a laminated ceramic composition which has a high dielectric constant and a low decrease rate of dielectric constant at DC bias, which can be used for bypass of computer module IC. The present invention provides a ceramic condenser composition which comprises BaTiO.sub.3, TiO.sub.2, CeO.sub.2 and Sm.sub.2 O.sub.3 by the molar ratio to satisfy the equation of (1-X-Y)BaTiO.sub.3 -X(CeO.sub.2)-Y(Sm.sub.2 O.sub.3)-(1.5X+3Y)TiO.sub.2 (wherein, 0.01<X+Y<0.05 and 0.015<1.5X+3Y<0.15). The composition has an excellent dielectric characteristics, since it has a high dielectric constant of 7000 or more at a temperature range of 50.degree. to 70.degree. C. which permits normal operations of IC, and a decrease rate of dielectric constant of below 10% at DC bias of 1 V/.mu.m. Accordingly, the ceramic composition of the invention can be applied for the development of a laminated ceramic condenser for bypass of computer module IC.
REFERENCES:
patent: 3035927 (1962-05-01), Janulionis
patent: 4330631 (1982-05-01), Kawashima et al.
patent: 4550891 (1985-11-01), Ayusawa et al.
patent: 4699891 (1987-10-01), Sato et al.
Y. Park and S. A. Song, Influence of Core-Shell Structured Grain on Dielectric Properties of Cerium Modified Barium Titanate, J. Mater. Sci.: Mater. in Elec., 6: 380-388 (1995), no month avail.
Y. Park and Y. H. Kim, The Dielectric Temperature Characteristic of Additives Modified Barium Titanate Having Core shell Structured Ceramics, J. Mater. Res., 10:2770-2776 (1995), no month avail.
Kim Ho-Gi
Park Yong-Joon
Park Yung
Brunsman David
Korea Advanced Institute of Science and Technology
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