Tdk Electronics Company, Limited

Tdk Kabushiki Kaisha

Hisao Abe

Yasunobu Oikawa

Hitoshi Masumura

Shoichi Iwaya

Sho Masujima

Yoshifumi Midori

Shinobu Fujiwara

Nobuaki Kikuchi

Norimasa Sakamoto

Yoshishige Towatari

Kenichi Umeda

Iwaya Shoichi

Masahide Shibuya

Current restriction element responsive to applied voltage

A D-E hysteresis loop of ferroelectrics known in the art has a square shape when the ferroelectrics are a BaTiO.sub.3 single crystal. Such ferroelectrics are used as a non-linear dielectric element of, for example a pulse generating device. The non-linear dielectric element according to the present invention consists of a polycrystal, which is mainly composed of BaTiO.sub.3 and has the chemical composition expressed by the formula A.sub.y B.sub.z O.sub.3, wherein the molar ratio of y/z ranges from 0.92 to 0.99. The non-linearity is excellent and the temperature dependence of the A.sub.y B.sub.z O.sub.3 composition is considerably low.

Non-linear dielectric element

A D-E hysteresis loop of ferroelectrics known in the art has a square shape when the ferroelectrics are a BaTiO.sub.3 single crystal. Such ferroelectrics are used as a non-linear dielectric element of, for example a pulse generating device. The non-linear dielectric element according to the present invention consists of a polycrystal mainly composed of Ba(Ti.sub.0.90-0.98 Sn.sub.0.02-1.00)O.sub.3 and having an average grain diameter of from 10 to 60 .mu.m. The non-linearity is excellent and the temperature dependence of the non-linearity is considerably low.

Non-linear polycrystalline barium titanate-type dielectric element

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Tokyo, Japan

Hisao Abe