Dielectric ceramics, and laminated ceramic capacitor

Details Dielectric ceramics, and laminated ceramic capacitor Dielectric ceramics, and laminated ceramic capacitor

2011-03-22

2011-03-22

Thomas, Eric (Department: 2835)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S321200, C501S136000

Reexamination Certificate

active

07911764

ABSTRACT:
A dielectric ceramic contains a BaTiO3-based compound as a main ingredient, and can be represented by the general formula: 100AmBO3+aNiO+bROn+cMOv+dMgO+eXOwwhere R represents a rare earth element such as Dy, M represents a metal element such as Mn, and X represents a sintering aid component containing Si. Ni is uniformly solid-solved in crystal grains, and the solid-solution region of the rare earth element in the crystal grains is an average 10% or less in terms of a cross section ratio. 0.96≦m≦1.030, 0.05≦a≦3, 0.1≦b≦1.5, 0.1≦c≦1.0, 0.1≦d≦1.5, and 0.05≦e≦3.5 are satisfied. A laminated ceramic capacitor has dielectric layers formed of the dielectric ceramic. As a result, a dielectric ceramic, and a laminated ceramic capacitor having excellent AC voltage characteristics, capable of keeping desired dielectric characteristics and excellent temperature characteristics, and having excellent withstand voltage and capable of ensuring reliability can be realized.

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Written Opinion of the International Searching Authority, mailed Sep. 9, 2008.

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