Piezoelectricity is the property of certain solids to become electrically polarised (i.e. to generate an electric field or potential) under the action of a mechanical stress. The property is used, for example, when playing vinyl disks.
The piezoelectric effect was studied by Pierre Curie.
A few examples of materials having piezoelectric properties:
- ceramics with a crystalline perovskite structure or tungsten-bronze structures;
- polymers based on rubber, wool, hair, wood and silk fibres.
Piezoelectric motors. Credits DR.