| 简介 |
This invention provides a dielectric ceramic comprising crystal grains having a core-shell structure composed mainly of barium titanate and a solid solution of calcium, vanadium, magnesium, manganese, and at least one rare earth element selected from, yttrium, dysprosium, holmium, erbium, and terbium, and a grain boundary phase present among the crystal grains. A dielectric ceramic having a high permittivity, a small change in specific permittivity depending upon the temperature, and, at the same time, no significant dependence of insulating resistance upon voltage can be produced by incorporating vanadium, magnesium, rare earth element, and manganese in a predetermined ratio into the crystal grains and bringing a Curie temperature to a range of 95 to 105ºC. |
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