Electrostrictive effect
The electrostrictive effect refers to the elastic deformation of a dielectric in an electric field. It is the inverse effect of the piezoelectric phenomenon. This phenomenon can be explained as follows: When a dielectric is placed in an electric field, its molecules are polarized. Along the direction of the electric field, the positive electrode of one molecule is connected to the negative electrode of another molecule. As the positive and negative poles attract each other, the entire dielectric is contracted in this direction until the internal elastic force and electric gravity balance. If an alternating voltage is applied between the two end surfaces of a dielectric object, and its frequency is the same as the natural frequency of the object, mechanical resonance will occur. Electrostriction has many applications in engineering technology, such as using piezoelectric quartz to make quartz clocks and generating ultrasonic waves. There is no volumetric deformation piezoelectric effect, but it has good thickness deformation and length deformation piezoelectric effect.