Dielectric ceramic composition and multilayer ceramic capacitor

A dielectric ceramic composition comprising,

• a main component comprising a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, said “m”, “x”, “y” and “z” all show a mol ratio, and each satisfies 0.94<m<1.1, 0<x<1.0, 0<y<1.0, 0<(x+y)<1.0, 0.06<z<0.2),
• a first sub component comprising oxides of a rare earth element R (note that, R is at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu),
• a second sub component as a sintering agent, wherein
• said dielectric ceramic composition comprises a dielectric particle and a particle boundary,
• said dielectric particles comprises a main component phase made of said main component, and a diffusion phase wherein said first sub component is diffused in said main component,
• a ratio of area occupied by said diffusion phase is 95% or more and less than 100% in average with respect to a total area of said main component phase and said diffusion phase,
• when a concentration of Ti atom in said diffusion phase is 100 atom %, then an average concentration Ra of the rare earth element R in the diffusion phase is 5 to 20 atom %,
• when the rare earth element concentration (atom %) is measured at a part excluding an area 20 nm or less from the particle boundary of said complete solid solution particle and at the diffusion phase excluding the area 20 nm or less from the boundary between the main component phase and the diffusion phase, then a standard deviation and an average value of a measured values satisfies (standard deviation/average value)<0.25.