Electrostrictive laminate

Abstract

Abstract PURPOSE:To obtain a stable displacing characteristics over a wide temperature range by composing an electrostrictive element of two or more types of electrostrictive ceramic materials which exhibit specific dielectric constant-temperature characteristics in which the temperatures that the specific dielectric constant becomes maximum are different in the prescribed temperature ranges to rapidly flatten the temperature characteristic. CONSTITUTION:An electrostrictive element is composed of two or more types of electrostrictive ceramic materials which exhibit specific dielectric constant-temperature characteristics in which the temperatures that the specific dielectric constant becomes maximum are different in the prescribed temperature ranges. In other words, the electrostrictive laminate 1 is formed of many laminated layers of disclike electrostrictive elements 2 formed with upper and lower electrodes through electrode plate 3. The elements 2 made of electrostrictive ceramic material of composition (a) is used for the electrostrictive element group 4a of the upper portion, the elements 2 made of a composition (c) are used for the intermediate electrostrictive element group 4b, and the elements 2 of a composition (d) are used for the electrostrictive element group 4c of the lower portion. Thus, specific dielectric constant-temperature characteristics become relatively a flat curve at the top as compared with the sole-component material to obtain the specific dielectric constant characteristic of less irregularity due to temperature change with small gradient in the entirety.

Inventors

• 👤 Tsutomu Kadooka
• 👤 勉 角岡
• 👤 Takerou Kinoshita
• 👤 木下　丈朗

Bibliographic Details