DIELECTRIC CERAMIC, PROCESS FOR PRODUCING THE SAME, AND LAMINATED CERAMIC CAPACITOR

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A dielectric ceramic comprising as a main component (Ba, Ca)(Ti, X)O3 (wherein X is an element of valence greater than that of Ti) and, per 100 mol of the main component, 0.1 to 4.0 mol of each of 1st to 3rd addition components. The 1st addition component is a given rare earth element, the 2nd addition component a given element of valence smaller than that of Ti, and the 3rd addition component a sintering auxiliary containing Si. In >= 90%% of main component particles (1), the sum of solid-solution ratios exhibiting the states of solid solution of individual addition components (2) in the main component particles (1) is<=10%% in terms of sectional area ratio. The molar ratio of Ca loaded is in the range of 0 to 0.20 (preferably 0.02 to 0.20), and the molar ratio (y) of element X loaded in B-site is in the range of 0.0001 to 0.005. As a result, even when the thickness of the dielectric layer is reduced to about 1 to 3 μm, a high specific inductive capacity can be exhibited, and excellent insulation and high-temperature load life can be attained without detriment to the temperature characteristic of electrostatic capacity. © KIPO & WIPO 2007