Patent ID: 8184428

Claim:
A dielectric ceramic, comprising: barium titanate; magnesium, a molar ratio of the magnesium to the barium in the dielectric ceramic being in a range of 0.01 to 0.06; yttrium, a molar ratio of the yttrium to the barium in the dielectric ceramic being in a range of 0.0014 to 0.06; manganese, a molar ratio of the manganese to the barium in the dielectric ceramic being in a range of 0.005 to 0.03; lutetium, a mass ratio of the lutetium to the barium titanate being in a range of 3.6 to 52.1 parts by mass of Lu 2 O 3 with respect to 100 parts by mass of the barium titanate; and a plurality of crystal grains comprising the barium titanate as a main component, wherein boundaries of the crystal grains are located between or among the crystal grains, and wherein an average diameter of the crystal grains is in a range of 0.05 μm to 0.2 μm.