DIELECTRIC CERAMIC AND LAMINATED CERAMIC CAPACITOR USING THE SAME

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PROBLEM TO BE SOLVED : To provide a dielectric ceramic having high permittivity and excellent temperature properties of a dielectric constant, and to provide a laminated ceramic capacitor using the same.SOLUTION : The dielectric ceramic contains vanadium by 0.05 to 0.3 mol expressed in terms of V2O5, one rare earth element (RE) selected from yttrium, dysprosium, holmium and erbium by 0.5 to 1.5 mol expressed in terms of RE2O3 to 100 mol of barium composing barium titanate, wherein crystal grains are composed of a first crystal group composed of crystal grains having calcium concentration of ≤0.2 atom% and a second crystal group composed of crystal grains having calcium concentration of ≥0.4 atom%, and in the X-ray diffraction chart of the dielectric ceramic, the diffraction intensity of the (004) plane showing tetragonal barium titanate is higher than the diffraction intensity of the (400) plane showing cubic barium titanate, and also, its Curie temperature is 100 to 120°C.COPYRIGHT : (C)2010, JPO&INPIT