Piezoelectric film is a type of thin film material that can convert mechanical energy into electrical energy or vice versa. It is made up of a polymer matrix with embedded piezoelectric particles, typically lead zirconate titanate (PZT).
Piezoelectric film works through the piezoelectric effect, which is the ability of certain materials to generate an electric charge when subjected to mechanical stress. When pressure or vibration is applied to the film, it causes the piezoelectric particles to deform, creating an electric charge.
Piezoelectric film has a wide range of applications, including sensors for measuring pressure and force, actuators for controlling movement in small devices, and energy harvesters for converting mechanical energy into electrical energy. It is also used in medical devices, such as ultrasound machines, and in consumer electronics, such as touch screens.
Piezoelectric film is typically made by coating a conductive substrate, such as a metal or glass plate, with a layer of polymer and then depositing piezoelectric particles onto the surface. This is followed by another layer of polymer to encapsulate the particles and create a complete film.
Piezoelectric film offers several benefits, including high sensitivity and accuracy, low power consumption, and a wide range of operating temperatures. It is also lightweight, flexible, and can be easily integrated into various devices and systems. Additionally, piezoelectric film is resistant to corrosion and can withstand harsh environments, making it a durable choice for many applications.