Patent ID: 7786036

Claim:
A dielectric ceramic composition containing at least 0.15 to 2.5 mol of a Mg compound in terms of MgO, 0 to 1.6 mol of a Ba compound in terms of BaCO 3 , 0.1 to 3.0 mol of a Ln compound in terms of Ln 2 O 3 , 0.01 to 0.4 mol of a Mn compound in terms of MnO 4/3 , 0.01 to 0.26 mol of a V compound in terms of V 2 O 5 , 0.3 to 3.5 mol of a Si compound in terms of SiO 2 , and 0.01 to 2.5 mol of an Al compound in terms of Al 2 O 3 as accessory components to 100 mol of barium titanate adjusted for a Ba/Ti molar ratio of 0.997 to 1.007 as a main component, wherein, the Ln includes Er as an essential component and further includes at least one of Dy and Ho, and wherein, when the Ln compound is represented by a formula x Er 2 O 3 +y Dy 2 O 3 +z Ho 2 O 3 , a composition of the Ln compound is in the range of a quadrangle with the following A, B, D, and E as each apex in a three-component constituent figure showing x, y, and z in a molar ratio, A: (x, y, z)=(0.05, 0, 0.95) B: (x, y, z)=(0.5, 0, 0.5) D: (x, y, z)=(0.5, 0.5, 0), and E: (x, y, z)=(0.05, 0.95, 0), where x+y+z=1.