Some crystals Authentic Erik Karlsson Jersey , when subjected to an external force in a certain direction, will have a polarization phenomenon inside, causing the charged particles to be relatively displaced, thereby generating charges of opposite magnitude and opposite signs on the crystal surface; [url= ]purchasing BIBO nonlinear crystal[url] when the external force is removed Authentic Logan Couture Jersey , it is restored to no Charged state. The amount of charge generated by the force of the crystal is proportional to the amount of external force. This phenomenon is called the piezoelectric effect. Conversely, if an electric field is applied to the crystal, the crystal will mechanically deform in a certain direction; when the applied electric field is removed, the deformation will also disappear. This phenomenon is called the inverse piezoelectric effect and is also called the electrostrictive effect. Principle of piezoelectric effect [url= ]wholesale BIBO nonlinear crystal[url] The cause of piezoelectricity is related to the crystal structure. The positive and negative charges centered on each other are pressed and separated to form an electric dipole Authentic Joe Thornton Jersey , so that the ends of the crystal in a specific direction have different amounts of charge. Common features of piezoelectric crystals: crystal point groups (symmetric) have no center of symmetry. [url= ]high quality Chinese BIBO nonlinear crystal[url] Among the 32 point groups of the crystal, 21 point groups do not have a symmetry center, but the crystal of the point group 432 does not exhibit piezoelectricity, so the crystal of 20 point groups has piezoelectricity.
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