| 简介 |
PROBLEM TO BE SOLVED : To provide a dielectric powder capable of forming a laminated ceramic capacitor that is less liable to short circuit and has a high reliability, even with a dielectric layer thickness of ≤0.8 μm.SOLUTION : A dielectric powder comprises : a barium titanate dielectric particle as a core particle; and a Ti-rich layer 2 with rare earth elements dissolved therein, which is present almost uniformly within a depth ranging from 0.5 nm to 10.0 nm from the outermost layer of the barium titanate particle and has a surface thereof further coated with a Ba compound 1. The Ba compound 1 in a coating layer is a composite compound with a shell component element, wherein the Ba/Ti ratio is controlled to ≥1.000 and ≤1.008, no barium carbonate equal to or larger than submicron size is contained as a heterogeneous phase, the average particle size of the dielectric powder calculated based on a BET specific surface area is ≥90 nm and ≤200 nm, and additive components other than the rare earth elements and Ba are contained as additives for adjusting characteristics. |
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