Patent ID: 7541305

Claim:
A dielectric ceramic composition having a main ingredient including a dielectric oxide expressed by the formula {(Me 1-x Ca x )O} m .(Zr 1-y Ti y )O 2 , where the symbol Me is at least one of Sr, Mg, and Ba and where the symbols m, x, and y indicating the molar ratios of the formulation in the formula are in relationships of 0.995≦m≦1.020, 0<x≦0.15, and 0≦y≦1.00, a first sub ingredient including an oxide of a rare earth element R, a second sub ingredient including an oxide of Mg, and a third sub ingredient including an oxide of Mn, wherein the ratios of the sub ingredients with respect to 100 moles of the main ingredient are: first sub ingredient: 0.1 to 6 moles in terms of value converted to oxide of R, second sub ingredient: 0.1 to 5 moles in terms of value converted to oxide of Mg, and third sub ingredient: 0.1 to 2.5 moles in terms of value converted to oxide of Mn, said dielectric ceramic composition further having as a fourth sub ingredient an oxide of A, wherein A is at least one element selected from the group of anionic elements having an effective ion radius at the time of hexacoordination of 0.065 nm to 0.085 nm, being selected from the group consisting of In, Ge, Al, Cu, Fe, Ni, Au, As, Cr, Ga, At, Os, Nb, Ta, Co, Rh, Ir, Ru and Sn, said dielectric ceramic composition further having as a fifth sub ingredient an oxide of V, the content of said fifth sub ingredient being 0.01 to 0.1 mole with respect to 100 moles of the main ingredient, and said dielectric composition further having as a sixth sub ingredient a sintering aid being (BaCa) x SIO 2+x , wherein x is 0.7 to 1.2, the ratio of Ba and Ca being any ratio.