| 摘要 |
A dielectric ceramic composition having at least a main component of BaTiO3, a first subcomponent including at least one compound selected from MgO, CaO, BaO, SrO and Cr2O3, a second subcomponent of (Ba, Ca)x,SiO2+x(where, x=0.8 to 1.2), a third subcomponent including at least one compound selected from V2O5, MoO3, and WO3, and a fourth subcomponent including an oxide of R1 (where R1 is at least one element selected from Sc, Er, Tm, Yb, and Lu), wherein the ratios of the subcomponents to 100 moles of the main component of BaTiO3 are as follows: first subcomponent: 0.1 to 3 moles, second subcomponent: 2 to 10 moles, third subcomponent: 0.01 to 0.5 mole, and fourth subcomponent: 0.5 to 7 moles (where the number of moles of the fourth subcomponent is the ratio of R1 alone). The dielectric ceramic composition has a high relative dielectric constant, has a capacity-temperature characteristic satisfying the X8R characteristic of the EIA standard (-55 to 150° C., DELTAC =±15% or less), enables sintering in a reducing atmosphere, has a small change in the capacity under a direct current electric field along with time, and further has a long lifetime of the insulation resistance.
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