Piezoelektrisches Mehrschichtelement

摘要

The present invention provides a multilayer piezoelectric part including a ceramic sintered compact composed of piezoelectric ceramic and having opposite first and second sides, first and second external electrodes respectively formed on the first and second sides of the ceramic sintered compact, a plurality of internal electrodes stacked in the ceramic sintered compact to overlap with each other with ceramic layers held therebetween in the thickness direction, and to be electrically connected to the first or second external electrode, and a dummy electrode provided between an end of at least one of the internal electrodes opposite to the end connected to one of the external electrodes, and the other external electrode not connected to the at least one internal electrode at the height where the at least one internal electrode is formed. In the multilayer piezoelectric part, the formation of the dummy electrode suppresses diffusion of an internal electrode constituent metal from the internal electrodes to the dummy electrode side.