| 简介 |
PROBLEM TO BE SOLVED : To provide a dielectric porcelain, which has high permittivity, has specific permittivity which varies depending on temperature so as to satisfy X5R characteristics in EIA specifications, and can realize high insulation resistance even in the case of low applied voltage, and to provide a laminated ceramic capacitor which comprises the dielectric ceramic as a dielectric layer and is excellent in service life properties in a high-temperature load test.
SOLUTION : The dielectric porcelain composed mainly of barium titanate having a different Ca concentration and contains, based on 100 moles of barium constituting the dielectric porcelain, 0.05-0.3 mole of vanadium in terms of V2O5, 0-1 mole of magnesium in terms of MgO, 0-0.5 mole of manganese in terms of MnO, 0.4-1.5 moles of a rare earth element (RE) selected from yttrium, dysprosium, holmium, and erbium, in terms of RE2O3. In an X-ray diffraction chart of the dielectric porcelain, the diffraction intensity of (004) plane which shows tetragonal barium titanate is larger than the diffraction intensity of (400) plane which shows cubic barium titanate.
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