| 摘要 |
A dielectric ceramic composition consists essentially of a basic component composed of 35 to 70 wt % of SrTiO3, 0.5 to 16 wt % of MgTiO3, 1.0 to 12 wt % of CaTiO3, 5 to 32 wt % of Bi2O3 and 5 to 16 wt % of TiO2, and additives composed of CuO, MnO2 and CeO2. The contents of the additives per 100 parts by weight of the main component are 0.05 to 1.0 parts by weight for CuO, 0.02 to 0.5 parts by weight for MnO2, and 1.0 to 8.0 parts by weight for CeO2, respectively. The composition possesses a high dielectric constant of more than 500, a high Q value of more than 1000 at 1 MHz, a small temperature change rate of capacitance of a maximum of -7.2% at +85 DEG C., and a small change rate of capacitance with direct current voltage.
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