Piezoelectric materials have been an essential component of various applications in engineering and science, particularly in actuator technology. These materials have the unique ability to convert mechanical energy into electrical energy and vice versa. One of the most commonly used piezoelectric actuators is the multilayer piezo stack actuator, which is widely used in many industries and applications.
In this blog post, we’ll take a closer look at what a multilayer piezo stack actuator is, how it works, and what it is used for.
What is a Multilayer Piezo Stack Actuator?
A multilayer piezo stack actuator is a type of piezoelectric actuator that uses multiple layers of piezoelectric materials, usually lead zirconate titanate (PZT), sandwiched between electrodes. These layers are bonded together, and the electric field applied to them causes the actuator to elongate or contract.
The multilayer design of the actuator allows for a much higher displacement than single-layer piezo actuators. This is because the multilayer design can produce a much larger output force due to the summation of the strains from each layer.
How Does a Multilayer Piezo Stack Actuator Work?
The operation of a multilayer piezo stack actuator is based on the principle of the piezoelectric effect. When a voltage is applied to the electrodes of the actuator, an electric field is created, which causes a deformation in the piezoelectric material. This deformation is proportional to the voltage applied, and the direction of the deformation depends on the polarity of the voltage.
The deformation of the piezoelectric material causes the actuator to expand or contract, producing a displacement. The amount of displacement depends on the thickness of the piezoelectric layers and the voltage applied.
What is a Multilayer Piezo Stack Actuator Used for?
Multilayer piezo stack actuators are widely used in various industries and applications due to their high displacement and force output capabilities. Some common applications of multilayer piezo stack actuators include:
- Precision positioning: Multilayer piezo stack actuators are used in precision positioning applications such as microscopy and nanotechnology. The high displacement and force output of the actuator allow for precise and accurate movements.
- Valve control: Multilayer piezo stack actuators are used in valve control applications where precise control of fluid flow is required.
- Aerospace and defense: Multilayer piezo stack actuators are used in aerospace and defense applications, such as controlling the movement of optical components and in missile guidance systems.
- Medical devices: Multilayer piezo stack actuators are used in medical devices, such as surgical tools and ultrasound imaging, where precise control and accuracy are critical.
In conclusion, multilayer piezo stack actuators are an essential component of various applications in engineering and science. Their high displacement and force output capabilities make them ideal for precision positioning, valve control, aerospace and defense, and medical devices. As technology advances, we can expect to see even more applications for multilayer piezo stack actuators in the future.