| 摘要 |
This invention provides a dielectric ceramic having a high permittivity of not less than 5500 and good permittivity-temperature characteristics, and a laminated ceramic capacitor that is small in size, has a large capacitance, and has static capacitance-temperature characteristics satisfying X5R characteristics. The dielectric ceramic has a composition comprising a BaTiO3-based or (Ba,Ca)TiO3-based main component and an additive component including a rare earth element and Cu. The composition has a structure comprising crystal grains (21) and grain boundaries (22) occupying the space among the crystal grains (21). The molar ratio of the average concentration of the rare earth element in the grain boundaries (22) to the average concentration of the rare earth element within the crystal grains is less than 2. In the cross section of the dielectric ceramic, for 55 to 85% in number, based on the crystal grains (21), of first crystal grains (21A), the proportion in which the rare earth element is present is not less than 90%. For 15 to 45% in number, based on the crystal grains (21), of second crystal grains (21B), the proportion in which the rare earth element is present is less than 10%.
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