|発明の名称||PIEZOELECTRIC MATERIAL AND MANUFACTURING METHOD THEREOF, DAMPING DEVICE, AND DRIVE UNIT|
PROBLEM TO BE SOLVED: To provide a flexible piezoelectric material capable of improving piezoelectric effect with a simple structure, to provide a method of manufacturing the piezoelectric material, to provide a damping device, and to provide a drive unit.
SOLUTION: The piezoelectric material 1 is a member, where a plurality of piezoelectric particles 2 are dispersed into a medium 3. The piezoelectric material 1 is manufactured by, for example, dispersing the piezoelectric particle 2, such as lead zirconate titanate, into the medium 3 with flowability, such as uncured silicone rubber, before the medium 3 is heated and cured by applying a voltage V to the medium 3. As a result, the piezoelectric particles 2 are oriented continuously in the direction of an electric field E so that the direction of the electric field E applied to the medium 3 becomes the same as the polarization direction of the plurality of piezoelectric particles 2. Therefore, polarizability in the orientation direction of the piezoelectric particles 2 becomes higher than that in conventional piezoelectric rubber, the large electric field E is generated when mechanical stress is applied and large strain is generated when the electric field E is applied, and hence large piezoelectric effect can be obtained.
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