| 摘要 |
To increase the dielectric constant of a dielectric ceramic containing ABO3 (A being Ba alone or further containing at least one of Ca and Sr, and B is Ti alone or or further contains at least one of Zr and Hf) as its main constituent and containing Re (Re is at least one of Dy, Ho, Sc, Y, Gd, Er, Yb, Tb, Tm, and Lu) as an accessory constituent, the main phase grains are ABO3 based main constituent and secondary phase grains have a different composition from the main phase grains. More Re is concentrated in the secondary phase grains in such a way that the ratio of the content of Re in the secondary phase grains to the total content of Re in the dielectric ceramic is 50% or more. The content of Re in the secondary phase grains is preferably 30 mol % or more.
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