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Piezoelectric sphere manufacturers take you to understand the physical mechanism of piezoelectric characteristics

2023-03-31 16:38

Piezoelectric sphere manufacturers tell you that the dielectric properties of piezoelectric ceramic sheets reflect the response of ceramic materials to external electric fields, usually expressed by a dielectric constant of 0. p is the polarization strength, 0 is the vacuum permittivity, the polarizability, and e is the applied electric field. Piezoelectric ceramic sheets for different purposes have different requirements for dielectric constant.

Physical Mechanism of Piezoelectric Properties:
Bound charges appear at both ends of the polarized piezoelectric ceramic plate, so a layer of free charges from the outside is adsorbed on the electrode surface. The Piezoelectric sphere manufacturer tells you that when an external pressure f is applied to the ceramic plate, a discharge phenomenon will occur at both ends of the plate. Conversely, pulling forces cause charging. The phenomenon that this mechanical effect is converted into an electrical effect belongs to the positive piezoelectric effect.
Piezoelectric sphere manufacturers tell you that in addition, piezoelectric ceramic sheets have the characteristics of spontaneous polarization, and the spontaneous polarization will change under the action of an external electric field. Therefore, when an external electric field is applied to a dielectric having piezoelectricity, and piezoelectric ceramics will deform. However, the reason for the deformation of piezoelectric ceramics is that the polarization strength is enhanced when the same external electric field as the spontaneous polarization is applied. Piezoelectric sphere manufacturers tell you that as the polarization strength increases, the piezoelectric ceramic sheet stretches along the polarization direction. Conversely, if a reverse electric field is applied, it will shorten along the polarization direction. The phenomenon that this electrical effect is converted into a mechanical effect is the inverse piezoelectric effect.