DIELECTRIC CERAMIC COMPOSITION AND ELECTRONIC COMPONENT

摘要

A dielectric ceramic composition includes at least dielectric particles having a core-shell structure and segregation particles, a concentration of a rare earth compound in the segregation particle is twice or more than an average concentration of the rare earth compound in a shell part of the dielectric particle having the core-shell structure, an area occupied by the segregation particles is 0.1 to 1.1%, when a maximum particle size of the segregation particle is defined as rbmax, a minimum particle size of the segregation particle is defined as rbmin, and an average particle size of the dielectric particle having the core-shell structure is defined as ra, a relation of rbmax/ra≦2.00 and rbmin/ra≧0.25 is satisfied, and the segregation particles substantially do not include Mg.

主权项

1. A dielectric ceramic composition comprising:
a main component having perovskite type crystal structure shown by a general formula ABO3, where A is at least one selected from the group consisting of Ba, Ca and Sr, and B is at least one selected from the group consisting of Ti and Zr; and an additive including at least a rare earth compound, wherein the dielectric ceramic composition includes at least dielectric particles having a core-shell structure and segregation particles, a concentration of the rare earth compound in the segregation particle is twice or more than an average concentration of the rare earth compound in a shell part of the dielectric particle having the core-shell structure, an area occupied by the segregation particles is 0.1 to 1.1%, when a maximum particle size of the segregation particle is defined as rbmax, a minimum particle size of the segregation particle is defined as rbmin, and an average particle size of the dielectric particle having the core-shell structure is defined as ra, a relation of rbmax/ra≦2.00 and rbmin/ra≧0.25 is satisfied, and the segregation particles substantially do not include Mg.