| 简介 |
Dielectric ceramic having a high dielectric constant of 5, 500 or more and exhibiting good dielectric constant temperature characteristic, and a small, high-capacitance monolithic ceramic capacitor having an electrostatic capacitance temperature characteristic satisfying the X5R characteristic are provided. The dielectric ceramic includes a BaTiO3 based or (Ba, Ca)TiO3 based primary component, a rare-earth element and Cu, and has a structure composed of crystal grains and grain boundaries between the crystal grains. The ratio of the average concentration of the rare-earth element in the grain boundaries to the average concentration of the rare-earth element in the inside of the crystal grains is less than 2, and in a cross section of the dielectric ceramic, the rare-earth element is present in 90% or more of the region of first crystal grains, the number of which is 55% to 85% of the crystal grains, and the rare-earth element is present in less than 10% of the region of second crystal grains, the number of which is 15% to 45% of the crystal grains. |
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