Patent ID: 8238077

Claim:
A dielectric ceramic, comprising: a plurality of crystal grains comprising a core-shell structure and comprising barium titanate as a main component; at least one grain boundary phase between or among the crystal grains; vanadium equivalent to 0.1 mol to 0.2 mol of V 2 O 5 per 100 mol of barium of the barium titanate; magnesium equivalent to 0.55 mol to 0.75 mol of MgO per 100 mol of barium of the barium titanate; at least one rare-earth element (RE) equivalent to 0.55 mol to 0.75 mol of RE 2 O 3 comprising at least one of yttrium, dysprosium, holmium, erbium, and terbium per 100 mol of barium of the barium titanate; and manganese equivalent to 0.25 mol to 0.6 mol of MnO, per 100 mol of barium of the barium titanate, wherein the dielectric ceramic has a Curie temperature in a range of 80° C. to 90° C. and a relative dielectric constant at 25° C. in the range from 3800 to 4200.