Multilayer piezoelectric element, fuel injector having the piezoelectric element and piezoelectric element production method

摘要

A multilayer piezoelectric element (1) includes at least one piezoelectric layer unit (2) having sintered piezoelectric ceramic and electrode layers alternately stacked together in a first direction and a positioning member that, when the at least one piezoelectric layer unit is placed in an enclosing member (9) in such a manner that the enclosing member encloses therewith a periphery of the at least one piezoelectric layer unit along a second direction perpendicular to the first direction, controls the position of the at least one piezoelectric layer unit within the enclosing member along the second direction.