In PICMA® multilayer actuators, the active layers consist of thin ceramic films surrounded by an all-ceramic insulating layer that protects electrodes against humidity, thereby highly reducing the risk of failure caused by leakage currents. The monolithic piezoceramic block of such an actuator is very reliable even under extreme ambient conditions and high temperature differences. It has succeeded in applications including machining, aerospace, life science, medical technology, and microscopy.
For additional protection, the piezo actuators used in the telescope hybrid actuator are embedded in sealed metal containers filled with nitrogen in order to reach 30-years of lifetime in the adverse ambient conditions in the Atacama Desert.
Authors: Oliver Dietzel, Stefan Vorndran