| 摘要 |
PURPOSE:To achieve a uniform electrostrictive effect by complementarily forming flat surface patterns of electrodes for upper and lower piezoelectric plates to be laminated. CONSTITUTION:A piezoelectric element 1 is formed by alternately laminating piezoelectric plates 11 made of piezoelectric ceramics and electrode plates 12 in multilayers. In the electrode nonexistent part of the plate 12, the exposed part of the surface of the piezoelectric plate is press-bonded to the lower surface of other piezoelectric plate to be laminated on the upper surface of the piezoelectric plate to be integrally connected. The electrode plate adjacent in a thickness direction to be laminated is formed complementarily with flat surface patterns of the electrode plates to correspond between electrode existent parts to generate an equivalent electric field at any position, thereby eliminating the presence of a nondeviated part. Thus, uniform electrostrictive effect is achieved, and the damage of the element due to a stress concentration can be avoided. |
