| 摘要 |
PROBLEM TO BE SOLVED: To improve drive characteristics, to obtain large voluminal change quantity and to lower the voltage of a drive part while reducing the size thereof. SOLUTION: A laminated piezoelectric element 10 is constituted of laminated piezoelectric elements 11 and has inner electrodes 12 between the piezoelectric elements. The piezoelectric element 10 has an active part A receiving an electric field by the voltage application of the inner electrodes 12 to generates displacement, and an inert part B receiving no electric field to generate no displacement and the relation between the width Wact of the active part A and the whole width Wall of the active part A and the inactive part B is Wact/Wall > 0.85.
|
