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The forward and inverse piezoelectric effect
Release Time: 2016-9-19 11:56:42

Some of the dielectric in a certain direction along the deformation by external force, the internal electrode phenomenon at the same time in two produced on the surface charge of opposite sign, when the external force is removed, restored to the uncharged state; and as the force direction is changed, the polarity of charge with the change. The amount of charge produced by the force of the crystal is proportional to the magnitude of the external force. This phenomenon is called positive piezoelectric effect. On the other hand, if a certain electric field is applied to the crystal, the crystal itself will produce mechanical deformation, and the external electric field will be evacuated and the deformation will disappear.

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