Murata Manufacturing Co., Ltd.

Tomomitsu Yamanishi

Osamu Yamaoka

Tatsuya Ishikawa

Kenji Kawabata

Naoki Kawara

Kazuji Kushiro

Tomohiro Kawanishi

A dielectric ceramic that contains, as its main constituent, a perovskite-type compound containing Ba and Ti, and, with respect to the Ti content of 100 parts by mole, contains Re1 (Re1 is at least one element of La and Nd) in the range of 0.15 to 3 parts by mole, Y in the range of 0.1 to 3 parts by mole, Mg in the range of 0.3 to 13 parts by mole, and Fe in the range of 0.01 to 5 parts by mole.

Dielectric ceramic and single-plate capacitor

A dielectric ceramic composition contains 100% by weight of main component composed of about 35 to 55% by weight of SrTiO , about 10 to 35% by weight of PbTiO , about 5 to 12% by weight of CaTiO , about 8 to 25% by weight of Bi O and about 5 to 13% by weight of TiO , and about 0.02 to 0.5% by weight of MnO, about 0.05 to 2% by weight of an oxide of at least one element selected from the group consisting of La, Ce, Nd, Pr, Sm, Dy, Er and Y, and about 0.02 to 0.8% by weight of CuO. The dielectric ceramic composition can provide a capacitor which exhibits a low loss and a high dielectric constant, and which can be used in the high frequency region, thereby permitting the advance in miniaturization of the capacitor.

Dielectric ceramic composition

Growing community of inventors

Nagaokakyo, Japan

Tomomitsu Yamanishi