Patent ID: 8183171

Claim:
A dielectric ceramic composition comprising: as a main component, a component represented by a composition formula {α(xBaO.yNd 2 O 3 .zTiO 2 )+β(2MgO.SiO 2 )}, wherein x, y, and z representing a molar ratio of BaO, Nd 2 O 3 , and TiO 2 are in the ranges: 14 (mol %)≦x≦19 (mol %), 12 (mol %)≦y≦17 (mol %), and 65 (mol %)≦z≦71 (mol %), respectively, and satisfy the relationship x+y+z=100, and α and β representing a volume ratio of each component in the main component are in the ranges: 35 (vol %)≦α≦65 (vol %) and 35 (vol %)≦β≦65 (vol %), respectively, and satisfy the relationship α+β=100 (vol %); and as minor components with respect to the main component, zinc oxide, boron oxide, a glass having a softening point of 570° C. or less, and silver, wherein when these minor components are represented as aZnO, bB 2 O 3 , cglass, and dAg, respectively, a, b, c and d representing a mass ratio of each of the minor components based on the main component are in the ranges: 0.5 (mass %)≦a≦12.0 (mass %), 0.5 (mass %)≦b≦6.0 (mass %), 0.1 (mass %)≦c<10.0 (mass %), and 0.1 (mass %)≦d≦3.0 (mass %), respectively.