Patent ID: 7790645

Claim:
A dielectric ceramic composition comprising Ba m TiO 2+m , where m is 0.99≦m≦1.01, Ba n ZrO 2+n , where n is 0.99≦n≦1.01, and an oxide of R, where R is at least one element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; wherein when A is a content of said Ba n ZrO 2+n with respect to 100 moles of said Ba m TiO 2+m , and C is a content of the oxide of said R, said A is 40≦A≦65 moles as calculated in conversion of Ba n ZrO 2+n , said C is 4≦C≦15 moles as calculated in conversion of R 2 O 3 ; and the following equations (1) and (2) are satisfied: 0.0038 A− 0.147 ≦B≦ 0.004 A+ 0.04 Equation (1) where B is a ratio of the X-ray diffraction maximum intensity among peaks of said Ba n ZrO 2+n with respect to the X-ray diffraction maximum intensity among peaks of said Ba m TiO 2+m ; and 0.0041 C− 0.0115 ≦D≦ 0.0046 C+ 0.084 Equation (2) where 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 Ba m TiO 2+m .