Murata Manufacturing Co., Ltd.

Toshiya Esumi

Shinichi Kobayashi

Harunobu Sano

Osamu Yamaoka

Kazuhiro Harada

Yoshitaka Kageyama

Makoto Murata

Akemi Ubata

An inexpensive capacitor for pulse generation whose characteristics do not deteriorate even when the capacitor is used in a high temperature, high vacuum, reducing atmosphere, and which enables generation of high-voltage pulses over a wide temperature range. The dielectric body of the capacitor is constructed of a non-linear dielectric ceramic which exhibits resistance to reduction. The non-linear dielectric ceramic comprises a polycrystalline substance containing barium titanate as a primary component, and when the polycrystalline substance is represented by (1&minus;a&minus;b)ABO &plus;aM&plus;bR wherein ABO is a barium titanate component and represents a perovskite structure, M is an oxide of at least one element selected from the group consisting of Mn, Ni and Co, R is an oxide of at least one element selected from the group consisting of La, Ce, Nd, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er and Yb, and a and b represent mole fractions; A, B, a, and b satisfy the following relationships: 1.000&lE;A/B&lE;1.006 (mole ratio), 0.3&lE;b/a&lE;3, 0.0015&lE;a&lE;0.0050, and 0.0015&lE;b&lE;0.0050, and a total content of M and R represented by Ad satisfies 0.3<Ad&lE;1.0 (wt. %).

Dielectric ceramic and a capacitor using the same

A high voltage ceramic capacitor includes a capacitor device, which is connected to a pair of metal terminals and which is housed in a ceramic housing. A first resin layer and a second resin layer separated by a space in the connecting direction of the two metal terminals are arranged such that the capacitor device and the contact portions between the capacitor device and the metal terminals are sealed airtight.

High voltage ceramic capacitor

Growing community of inventors

Hirata, Japan

Toshiya Esumi