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Electrostriction

Lecture



Electrostriction - the effect of changing the linear dimensions of a substance when an electric field is applied to it. It is observed absolutely in all substances (in contrast to the piezoelectric effect, which exists only in crystals with a certain symmetry).

The connection between the deformation and the electric field is quadratic. The linear relationship between the deformation and the electric field is observed in piezoelectrics.

The highest values ​​of electrostriction are observed in substances that are called ferroelectric relaxors.

Formally, the electrostriction coefficient is a fourth-rank tensor ( Electrostriction ), depending on the mechanical stress (second rank tensor Electrostriction ) and polarization (first rank tensors Electrostriction , Electrostriction ).

= Q_ {ijkl} \ times P_ {k} \ times P_ {l}} Electrostriction

see also

  • Magnetostriction
created: 2017-07-08
updated: 2023-07-31
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Electrostatics

Terms: Electrostatics