Multilayer Piezo Actuators / Ceramic Stack

A piezoelectric element is a polarized ceramic or crystalline material that experiences mechanical deformation when an electrical charge is applied. The electrical charge creates a linear movement and force. Piezo actuators utilize this principle to achieve their precise linear movement, high force generation, and high load capabilities. This makes piezo stack actuators suitable for high precision applications. In addition, the piezo stack actuator device can give an extremely fast response as well as high acceleration rates.

Multilayer piezo actuators are created by arranging multiple layers of piezoelectric materials on top of each other. This can be accomplished in two ways: either the components are fired separately and connected later via adhesive (discrete stacks; the components are normally discs), or they are co-fired and bound by subjecting them to intense heat and pressure, or sintering (monolithic stacks). The underlying principle of stack piezo actuators is the intrinsic quality of constancy. The charge generated is independent of the size of the ceramic a user is working with (this is mathematically modeled by the longitudinal effect). Thus, putting many pieces together creates a multiplicative effect on their transformations’ magnitude for the same voltage, amplifying their power.

The laminated piezoelectric ceramic actuator is made by co-firing up to hundreds of layers of piezoelectric ceramic film and internal electrodes.The unit height is 36mm, and the maximum stack height of the device can reach 100mm; when a voltage is applied, the device can generate a length square within milliseconds. Deformation, the maximum displacement can reach 0.15% of the total length of the product, and a huge output is generated at the same time.

Applications

We offer a variety of multilayer piezo actuators. Shape, finish, material, dimensions, and performance levels can all be customized! 

If none of these products match your requirements, click here contact our engineers to custom your multilayer piezo actuators.