Dielectric ceramic composition and laminated ceramic capacitor

Details Dielectric ceramic composition and laminated ceramic capacitor Dielectric ceramic composition and laminated ceramic capacitor

2009-12-10

2010-06-22

Ha, Nguyen T (Department: 2831)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S311000, C361S306100, C361S313000, C361S321100, C361S301400, C501S134000, C501S135000

Reexamination Certificate

active

07742278

ABSTRACT:
There is provided a dielectric ceramic composition that is a dielectric ceramic material used for a laminated ceramic capacitor; that can be co-fired with internal electrodes mainly composed of Ni at a temperature of 1300° C. or less; and that has a high dielectric constant, good temperature characteristics of capacitance in a range of −55 to 175° C., and a high resistivity ρ at 175° C. The dielectric ceramic composition includes a main component represented by a composition formula (1-a) (K1-xNax)(Sr1-y-zBayCaz)2Nb5O15-a(Ba1-bCab)TiO3(where a, b, x, y, and z are all molar amounts and 0.3≦a≦0.8, 0≦b≦0.2, 0≦x<0.2, 0.1≦y≦0.5, 0.1≦z≦0.5, and 0.2≦y+z≦0.7); and M, as an additional component, in an amount of 0.1 to 40 parts by mole relative to 100 parts by mole of the main component (where M is at least one element from the group of V, Mn, Cr, Fe, Co, Ni, Zn, Mg, and Si).

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PCT Written Opinion.

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