Technology for Making Multilayer Piezo Actuators

PI Ceramic has developed a new type of production technology that enables it to produce multilayer piezo actuators with inner holes or in unusual shapes. The new technology can produce tiny holes and structured ceramic surface and almost any type of contour - even three-dimensional ones. Special milling machines work the sensitive ceramic films in the green state (before sintering). The individual layers are then equipped with electrodes and laminated. The co-fired process is used to sinter the ceramic with the internal electrodes, as happens with PICMA standard actuators.

The result is a continuous insulating ceramic layer with all its familiar advantages. The piezo actuator is protected against humidity and has a high dielectric strength, which significantly increases the lifetime when compared with conventional polymer-insulated actuators. PICMA piezo stack actuators with additional inner hole are suitable for fibre-stretching applications, for example. It is also possible to produce piezo bender elements in different designs with and without a hole.

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