| 摘要 |
Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula (Ba1-αMα)A(Ti1-&bgr;Mn&bgr;)BO3 and having hexagonal structure wherein an effective ionic radius of 12-coordinated M is −20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Ba2+ and the A, B, α and &bgr; satisfy relations of 0.900≦̸(A/B)≦̸1.040, 0.003≦̸α≦̸0.05, 0.03≦̸&bgr;≦̸0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, Mn3O4 and/or Cr2O3, CuO, Al2O3, rare earth element oxide and glass component including SiO2. According to the present invention, it can be provided the hexagonal type barium titanate powder and dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing high specific permittivity, having advantageous insulation property and sufficient reliability.
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