Taiyo Yuden Co., Ltd.

Noriyuki Kohzu

Kenji Saito

Youichi Mizuno

Yoshikazu Okino

Koichiro Morita

Hirokazu Chazono

Yasunobu Kawamoto

A ceramic capacitor containing at least one dielectric layer formed from a dielectric ceramic composition comprising a sintered body containing ceramic particles having a core/shell structure in an amount of 15% or more based on the total ceramic particles of the sintered body, the core/shell structured particle being composed of a core portion, which is BaTiO crystal, and a shell portion surrounding the core portion, which is made of a solid solution comprising BaTiO as a major component, has excellent temperature characteristics and a long life-time.

Dielectric ceramic composition and ceramic capacitor

Dielectric ceramic includes dielectric ceramic grains having BaTiO as a major component thereof, a portion of the dielectric ceramic grains having a ferroelectric core and a paraelectric shell into which Mg and a rare earth element are diffused. The shell being located at least on a part of a surface of the core, wherein the shell includes at least two shell portions having different components diffused thereinto. The shell portions can be radially disposed on one another or be in direct contact with the surface of the core.

Dielectric ceramics, multilayer ceramic electric parts and method for the manufacture thereof

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Tokyo, Japan

Noriyuki Kohzu