The application areas of piezoelectric material are divided into two categories: vibrational energy and ultrasonic vibrational energy, electric energy transducer, which include electro-acoustic transducer, underwater acoustic transducer, ultrasonic transducer and other application in sensor and actuator.
Transducer converts mechanical vibration to electrical signal, or generates mechanical vibration that is driven by electric field. Piezoelectric polymer sound components apply the transverse piezo effect of polymer . While the design of transducer utilizes flexible vibrations that driven by external electric field with a polymer bimorph or a single piezo disc. By using the above-mentioned principle, electro-acoustic products like microphone, headphone and high-frequency speaker could be produced.
Piezoelectric actuator, base on the reverse piezoelectric effect, it converts electric energy to mechanical energy or mechanical motion, Polymer actuator is mainly base on polymer bimorph, include transverse effect and longitudinal effect, Actuator base on polymer dimorph is used in the research of display device control, Micro displacement system and so on.