Patent ID: 8420560

Claim:
A dielectric ceramic comprising: a main component that contains a BaTi 4 O 9 crystal phase and a Ba 2 Ti 9 O 20 crystal phase and is represented by a composition formula (BaO.xTiO 2 ), the main component having a molar ratio x of TiO 2 with respect to BaO, the molar ratio x being in the range of 4.6to 8.0, and in X-ray diffraction, the main component having an X-ray diffraction peak intensity ratio I 29 I 14 of a maximum diffraction peak intensity (I 14 ) of the BaTi 4 O crystal phase to a maximum diffraction peak intensity (I 29 ) of the Ba 2 Ti 9 O 20 crystal phase, the X-ray diffraction peak intensity ratio I 29 /I 14 being 1 or more; and a minor component that contains a boron oxide and a copper oxide, in which a content of the boron oxide in terms of B 2 O 3 is in the range of 0.5 to 5.0 parts by mass with respect to 100 parts by mass of the main component, and a content of the copper oxide in terms of CuO is in the range of 0.1 to 3.0 parts by mass based on 100 parts by mass of the main component.