Three polarization elements of piezoelectric ceramics

Only under the action of the polarized electric field, the electric domains can be arranged along the direction of the electric field, so it is the main factor of the polarization condition. The higher the polarization electric field of , the greater the effect of piezoceramics crystal is promoting the alignment of electric domains, and the more sufficient the polarization. Therefore, the polarization electric field decreases accordingly, and the polarization effect can be achieved by increasing the polarization temperature and prolonging the polarization time.

 

Under the conditions of constant polarization electric field and polarization time, the higher the polarization temperature of piezo ceramics plate is, the easier electric domains are arranged, and the better the polarization effect is. Because it is increasing the polarization temperature,which can shorten the eye transition time and improve the polarization efficiency.

 

Polarization time refers to the heat preservation and pressure holding time required for piezoceramic products to change from one equilibrium state to another. After a long time, the steering arrangement of the electric power is enough to facilitate the relaxation of the stress during the polarization process.

 

Considering that comprehensively, the determination of the polarization conditions should be based on the principle of giving full play to the piezoelectric ceramic sensors , it is improving the yield and saving time. For materials with different components, the optimal polarization conditions should be optimized through experiments under the guidance of the principles of polarization technology. At present, the series of high-voltage polarization devices produced are special high-voltage polarization devices specially designed for piezoelectric ceramics. High-voltage polarization power supply is a high-voltage power supply specially developed and produced by our company for polarization equipment. The internal power supply adopts PWM control technology. And it adopts modular circuit design, which has the characteristics of stable high voltage output, it is conversion efficiency greater than 80%, time drift and temperature drift better than 0.1%, strong anti-interference performance, strong structure, safe and convenient, easy to use and easy to maintain.