A ceramic capacitor and dielectric ceramic composition and method of manufacturing the same

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PROBLEM TO BE SOLVED : To provide a dielectric ceramic composition which has maximum relative permittivity of ≥10, 000, has a grain size of its sintered compact of ≤2 μm, can be fired at a low temperature of ≤1, 250°C in a reduction atmosphere, and to provide a ceramic capacitor and their production methods. SOLUTION : The dielectric ceramic composition comprises a sintered compact which contains the oxides of Ba, Ti and Zr as main ingredients, and those of Re (at least one rare earth element selected from the group consisting of Y, Dy and Ce), Mg, Mn, Si and Ca as accessory ingredients. The main ingredient is represented by a composition formula, Ba(Ti1-xZrx)O3(wherein 0.05≤x≤0.15; and the ratio, Ba/(Ti1-xZrx) ranges from 0.99 to 1.01). The composition contains, as accessory ingredients, the oxides of Re, Mg, Mn, Si and Ca in the amounts, by molar pts., of 0.3-1.0, 0.3-1.0, 0.1-0.5, 1.0-2.0 and 0.5-3.0 in terms of each element, respectively based on 100 molar pts. of the main ingredient. COPYRIGHT : (C)2006, JPO&NCIPI