PIEZOELECTRIC CERAMIC-PZT

Piezoelectricity is the charge which accumulates in certain solid materials in response to applied mechanical stress. It is the direct result of the piezoelectric effect. This effect is understood as the linear electromechanical interaction between the mechanical and the electrical state in crystalline materials with no inversion symmetry. The piezoelectric effect is a reversible process in that materials exhibiting the direct piezoelectric effect (the internal generation of electrical charge resulting from an applied mechanical force) also exhibit the reverse piezoelectric effect (the internal generation of a mechanical strain resulting from an applied electrical field).
Lead zirconate titanate (Pb[ZrxTi1−x]O3 0≤x≤1) more commonly known as PZT is the most common piezoelectric ceramic in use today.