Piezoelectricity is the ability of some materials to generate electric potential in response to applied mechanical stress. These materials also exhibit the reverse effect, by changing in shape when an electric field is applied. Piezoelectric materials are rigid, chemically inert, and immune to humidity or any other weather conditions, and due to such rigidity are able to support and carry-out great efforts.
The discovery and technological progress of ceramic piezoelectric parts has created a vast array of applications for medical and esthetic apparatus, industrial tools, alarm and counting control and measuring, welding tools, fault detectors, ultrasonic cleaning and degreasing, acoustics, and countless applications in the ultrasound electronics area.
This important discovery continuously creates new horizons in the technological progress, and thanks to the nature of these materials, can be conformed to diverse shapes and sizes, with polarities chosen as per the projection of the transducer.