Piezoelectric ceramic buzzer
Time:
2023-06-13 22:09
Source:
Piezoelectric ceramic buzzer is a device used in the application of piezoelectric ceramic chips. A common method is to prepare titanium and piezoelectric ceramic sheets (pzt) made by sintering zirconium and lead oxides. In order to improve low-frequency response, a double diaphragm structure is generally used.
In ionic crystals, positive and negative ions are arranged in a regular staggered manner, forming a crystal lattice. In this way, an inherent electric moment is formed, and polarization charges appear on the surface of the crystal. However, due to the exposure of the crystal to air, after a period of time, these charges are neutralized by heterologous ions that fall on the crystal surface and in the air. Therefore, neither polarization charge nor electric moment will appear. However, when the crystal undergoes mechanical deformation, the lattice undergoes a change. In this way, the electric moment changes, and the surface polarization charge value also changes. As a result, both positive and negative charges on the surface have measurable increment (increase or decrease), which is the electric quantity of Piezoelectricity.
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