Patent ID: 8008221

Claim:
A dielectric ceramic composition comprising; Ba m TiO 2+m where 0.99<m<1.01, and Ba n ZrO 2+n where 0.99<n<1.01, wherein said dielectric ceramic composition comprises plurality of dielectric particles and a grain boundary phase present between said dielectric particles adjacent to each other, when said dielectric particle having Ba m TiO 2+m as a main component is defined as a first dielectric particle and said dielectric particle having Ba n ZrO 2+n as a main component is defined as a second dielectric particle, an average crystal diameter of said first dielectric particle is defined as D 1 (μm), and an average crystal diameter of said second dielectric particle is defined as D 2 (μm), then a ratio (D 2 /D 1 ) of said D 2 with respect to said D 1 is 0.04 to 0.33, while said D 2 is 0.02 to 0.25 μm, and in said dielectric ceramic composition a ratio of the total number of said second dielectric particle with respect to the total number of said first dielectric particle is 0.10 to 2.