| abstract |
The present invention relates to a dielectric ceramic composition comprising BaTiO 3 , BaZrO 3 , and the oxide of R wherein, when A is the content of BaZrO 3 , and C is the content of the oxide R, with respect to 100 moles of BaTiO 3 , then A is 40 ≤ A ≤ 65 moles and C is 4 ≤ C ≤ 15 moles; plus said dielectric composition satisfies the equation (1) and (2). The present invention can provide a dielectric ceramic composition good in IR lifetime, and capable to be suitably used for medium-high voltage which has a high rated voltage (for example, 100V or more). 0.0038 A - 0.147 ≤ B ≤ 0.004 A + 0.04 (note that, B is a ratio of the X-ray diffraction maximum intensity among peaks of said BaZrO 3 with respect to the X-ray diffraction maximum intensity among peaks of said BaTiO 3 ). 0.0041 C - 0.0115 ≤ D ≤ 0.0046 C + 0.084 (note that, D is a ratio of the X-ray diffraction maximum intensity among peaks of the oxide of said R with respect to the X-ray diffraction maximum intensity among peaks of said BaTiO 3 ). |