| abstract |
The invention relates to a piezoelectric actuator (1) with a plurality of disks (2) made of piezoelectric material, which are arranged to form a stack (25) in a stacking direction, and a plurality of flat internal electrodes (5, 6) which are connected to the disks (2) of piezoelectric material are arranged alternately, and at least two outer electrodes (3, 4) applied along the stacking direction on the outside of the stack, the inner electrodes (5, 6) alternately with one of the outer electrodes (3, 4) each via one Contact area are connected. According to the invention, the outer electrodes (3, 4) are applied in the form of a coating made of an elastic, electrically conductive polymer material (15) on the outside of the stack (25). |