Provided are a laminated piezoelectric element which is equipped with a covered layer that is capable of alleviating a stress generated by expansion and contraction of a laminated body and is prevented from peeling off even due to a long drive, a manufactu...

The invention concerns an encapsulated actuator as well as a method of encapsulating an actuator/stack in an encapsulation member, which comprising at least an innermost heat shrinkable, polymeric sleeve member and an overlaying outermost, heat shrinkable,...

Piezoelectric actuator (1) comprises a piezoelectric ceramic surrounded by a casting composition (2) containing a chemically reducing material, especially hydrogen. The concentration of the reducing material in the casting composition lies below a prescrib...