Multilayer Bending Actuators with Large Displacement
PICMA® multilayer piezo bender actuators provide particularly large stroke in combination with high dynamics. Their piezo voltages are low, while their bimorph structure ensures bidirectional displacement.
The technology of monolithic PICMA® multilayer actuators is synonymous with high reliability and long lifetimes.
PICMA® piezo bender actuators are produced in a wide range of shapes. Depending on the application, they can also be assembled with adapted ceramic or metal end pieces, additional coating, temperature sensors, etc. On request, we gladly offer you customized products.
Standard contacts for piezo actuators are 100 mm stranded wires or soldering points. For each piezo element, different wires acc. to the AWG standard are used. Please observe the soldering instructions for each product.
Piezo actuators can be equipped with position sensors to measure the displacement and are then suitable for repeatable positioning with nanometer precision. PI Ceramic uses strain gauge sensors (SGS) consisting of a thin metal foil that is applied to the piezo ceramics.
Multilayer PICMA® bending actuators can be manufactured in smallest dimensions of only a few millimeters. Dimensions larger than those of standard actuators are also possible. The geometry is determined by force generation and dynamics requirements.
Multilayer bending actuators can be manufactured in almost any shape. Round or triangular cross-sections and inner holes can be manufactured, for example, thus simplifying the actuator integration into the application. Like PICMA® standard actuators, these actuators are also all-ceramic insulated actuators.
Low Piezo Voltage
Multilayer elements are controlled by much lower voltages than single-layer piezo elements. The height of the active layers in PICMA® multilayer bending actuators can be reduced to a minimum height of 15 μm, so that even operating voltages of only 10 V are sufficient for operation.
Higher Stiffness and Larger Displacement
Benders with unidirectional displacement consist of a single active piezoceramic layer that is glued together with a substrate consisting of AI2O3 ceramic or stainless steel. In comparison with the bimorph structure, these actuators achieve higher stiffnesses and a larger, but only unidirectional displacement.
Multilayer contracting plates can be manufactured in a variety of shapes, e.g. rectangular or disc-shaped, and are available on request. These plates can be applied, e.g. to metal or silicon substrates, in order to realize bender or pump elements with low control voltages.
PI Ceramic integrates piezo ceramics into the customer’s product. This includes both the electrical contacting of the elements according to customer requirements and the mounting of components provided by the customer, as well as the gluing or the casting of the piezo ceramics. PICMA® bender actuators can be provided, for example, with specially adapted holders, which facilitate their installation at the customer's.
Bending Actuators made of Piezo Elements prepared in Pressing Technology
Alternatively to their assembly from multi-layer piezo ceramics, bending actuators can also consist of from disks or plates manufactured in pressing technology. The actuators can be made of two layers (bimorph) or be assembled as a composite bender on a substrate.