Patent ID: 8778819

Claim:
A dielectric ceramic composition comprising an ATiO 3 (A is an element consisting of at least one of Ca and Sr) phase and an AAl 2 Si 2 O 8 phase, wherein the dielectric ceramic composition comprises Al, Si, A and Ti as main components and further B as an additional element in the following ratio: with respect to 100 parts by weight of the whole of the dielectric ceramic composition, 11 to 25% by weight of the Al element in terms of Al 2 O 3 , 20 to 33% by weight of the Si element in terms of SiO 2 , 5 to 30% by weight of the A element in terms of AO, 0.9 to 5% by weight and of the B element in terms of B 2 O 3 , and TiO 2 (containing inevitable impurities) as a remainder; and the dielectric ceramic composition has a dielectric constant of 10 or higher at 3 GHz and an average thermal expansion coefficient of lower than 7 ppm/° C. in the temperature range of 40 to 600° C.