| 摘要 |
A multilayer piezoelectric element is provided which has excellent durability even if it is continuously driven for a long period of time under high temperature and high humidity. The multilayer piezoelectric element has a laminated body that a plurality of piezoelectric layers are laminated through an internal electrode interposed therebetween, in which the internal electrode, a dummy electrode spaced apart and electrically insulated from the internal electrode, and an insulating part between the dummy electrode and the internal electrode are arranged between two adjacent piezoelectric layers. A porous part having a larger number of voids than the internal electrode is formed at positions opposed in the laminating direction to the internal electrode, the dummy electrode and the insulating part through the piezoelectric layer interposed therebetween, respectively. |
