| 简介 |
PROBLEM TO BE SOLVED : To provide a dielectric porcelain which has high dielectric constant, satisfies X7R characteristics of EIA standard in the temperature change of the specific dielectric constant, and in which a higher insulation resistance can be obtained even when a lower voltage is applied, and to provide a multilayer ceramic capacitor which has such dielectric porcelain as a dielectric layer and has excellent life characteristics under a high-temperature load test.
SOLUTION : The dielectric porcelain is one that comprises barium titanate as the main component having a calcium concentration of at least 0.4 atom%, and comprises, against 100 mol of barium which constitutes the dielectric porcelain, 0.05-0.3 mol of vanadium in terms of V2O5, 0-0.1 mol of magnesium in terms of MgO, 0-0.5 mol of manganese in terms of MnO, and 0.5-1.5 mol of at least one kind of rare earth elements selected from yttrium, dysprosium, holmium and erbium in terms of RE2O3, and has diffraction intensity of plane (004), which exhibits tetragonal barium titanate, larger than diffraction intensity of plane (400), which exhibits cubic barium titanate, in X-ray diffraction chart of the dielectric porcelain.
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