| 简介 |
PROBLEM TO BE SOLVED : To provide a laminated ceramic capacitor suitable for intermediate to high voltage applications, capable of acquiring excellent reliability even when the thickness of a dielectric layer is reduced.
SOLUTION : This dielectric ceramic contains a composition represented by general formula {100(BaTiO3+aBaZrO3)+bRO3/2+cMgO+dMnOx+eSiO2} (where R is a specific rare earth element, 0≤a≤0.2, 8.0≤b≤12.0, 1.0≤c≤10.0, 0.1≤d≤3.0, and 1.0≤e≤10.0), and includes first grains whose particle sizes are ≥0.7 μm and second grains whose particle sizes are ≤0.6 μm, wherein an average first grain size Aave and an average second grain size Bave satisfy 0.8 μm≤Aave≤2.0 μm, 0.1 μm≤Bave≤0.5 μm, and Aave/Bave≥3.0, and the area ratio SA occupied by the first grains and the area ratio SB occupied by the second grains satisfy 0.3≤SA≤0.9, 0.1≤SB≤0.7, and 0.8≤SA+SB≤1.0.
COPYRIGHT : (C)2012, JPO&INPIT |
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