Technical Highlights of Co-Fired Multi-Layer Piezo Stack Actuators

Piezo stack actuation is a solid-state technology, which enables high technology solutions. Due to unique properties piezoelectric actuation extends the portfolio of established actuator principles with regard to important features:

• High forces up to tons load capability and force density up to 400 N per cm².

Displacement of stack actuators are up to 400 um and several mm for stacks with amplification mechanism or bender type actuators.

• Ultra fast response: up to several ten kHz, tens of microseconds rise time, and 
  ultra high acceleration up to 100.000 m/s2.
• High stiffness. Piezo is a structural actuator.
• Solid-state – no friction, no lag, and no wear.
• High stroke resolution up to the sub nm range.
• Retain position with very low power consumption.
• Unique form factor, scalable size down to mm dimensions.
• No magnetic fields.
• Conform with vacuum and cryogenic environment.
• Low drive voltage (150 V).
• Simple mechanical interfaces.
• Long life - tested up to 10¹⁰ cycles.
• Multi-functional performance: actuation and sensing capabilities for strain, stress and acceleration.

Keywords: Piezoceramic / Piezo Aktuator / Piezo Actuator/ Piezo Actor

Due to the excellent controllability piezoelectric actuators are extremely suitable for precision positioning and fast high-force actuation. Piezoelectric actuators enable ultra-precise devices that achieve accuracies of atoms.

The piezoelectric effect is characterized by a high speed. The electro-mechanical conversion is directly related to the construction of the electric field in the material. The acceleration involved is enormous and values of several thousand g can be obtained. Because of their very high electrical insulation resistance piezoelectric actuators have low power consumption in static application. In contrast, electromagnetic drives consume already on hold energy (coil currents) and are much slower. Piezoelectric actuators develop high actuatoric forces and also allow miniaturization.