DIELECTRIC CERAMIC AND LAMINATED CERAMIC CAPACITOR

摘要

[PROBLEMS] To provide a dielectric ceramic, which has high permittivity and low dielectric loss, can satisfy X7R properties in EIA standards in a temperature change of specific permittivity, and can realize high insulating resistance even in the case of low applied voltage, and a laminated ceramic capacitor which comprises the dielectric ceramic as a dielectric layer and has an excellent service life property in a high-temperature load test. [MEANS FOR SOLVING PROBLEMS] A dielectric ceramic composed mainly of barium titanate and containing predetermined amounts of vanadium, magnesium, manganese, and a rare earth element, wherein the diffracted intensity of a (004) face, which exhibits tetragonal barium titanate, is larger than the diffracted intensity of a (004) face, which exhibits cubic barium titanate, the crystal grain comprises a crystal grain having a calcium concentration of not more than 0.2 atomic% and a crystal grain having a calcium concentration of not less than 0.4 atomic%, the area ratio of the crystal grain having a calcium concentration of not less than 0.4 atomic% is 0.4 to 0.7, and the average diameter of the crystal grains is 0.21 to 0.28 µm.