Piezoelectric coefficient

Piezoelectric coefficient or Piezoelectric Modulus, aka D33, quantifies the volume change when a piezoelectric material is subject to an electric field, or the polarization on application of a stress: d= \dfrac{P}{\sigma} where P is polarization, and \sigma is the stress.

There are actually many Piezoelectric coefficients: Dxy.

See Piezoelectricity#Mechanism.

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