PZT4 Piezoceramic Plate

PZT4 Piezoceramic Plate

PZT4 Piezoceramic plate materials are widely used in the fields of sensors, ultrasonic transducers, electroacoustic transducers, ceramic transformers, electro-optical devices, etc. They have good mechanical properties and stable piezoelectric properties. However, the premise for piezoelectric ceramics to possess piezoelectric properties is that they need to be polarized before they can be formed. So why do piezoelectric ceramics need to use silicone oil cleaning agent to clean silicone oil?

First of all, let us understand why residual silicone oil is formed on the surface of piezoelectric ceramics? That’s because piezoelectric ceramic polarization generally has three common methods: oil bath polarization, air polarization, and high temperature air polarization. And the oil bath polarization method is suitable for piezoelectric ceramic materials with high polarization electric field. It uses methyl silicone oil as an insulating material to polarize piezoelectric ceramic products under certain conditions of polarization electric field, temperature and time period. Methyl silicone oil has the advantages of a wide temperature range, high insulation strength and good moisture resistance. However, after the polarization is completed, silicone oil will remain on the surface of the piezoelectric ceramic, which will affect the subsequent process. , So it is necessary to clean the silicone oil.

For piezoelectric ceramic workpieces, if the alkaline cleaning agent commonly used in the industry is applied, it may affect its performance, or even damage the surface, and the alkaline cleaning agent will still have certain harm to the human body in terms of construction. With environmental protection and pressure As the requirements for electrical ceramic products continue to increase, neutral and non-corrosive silicone oil cleaners are becoming more and more popular.

Neutral silicone oil cleaning agent is a dilutable concentrated liquid that is used after being diluted with water, which will emulsify, penetrate and peel the residual silicone oil on the surface of the workpiece. The pH is a neutral water phase system, thereby replacing the traditional solvent and surface activity. A high-efficiency cleaning formula that complies with laws and regulations can be formulated by simply adding water. At the same time, it is easily biodegradable, low odor, no alkyl phenol polyoxyethylene ether (APE), no corrosiveness, and passed the RohS test.

In terms of use, the cleaning effect of silicone oil cleaning agent is more obvious when used with ultrasonic. Because the strong shock wave is generated when the cavitation bursts, the silicone oil is peeled off under the action of the shock wave, that is, dispersed and peeled off, plus the silicone oil cleaning in the ultrasonic cleaning The agent solution itself greatly improves the cleaning force through ultrasonic vibration. At the same time, by increasing the temperature of the cleaning liquid and the cleaning time, it is more conducive to the cavitation effect. Therefore, in application, for uncured silicone oils of different viscosities, the concentration of the solution can be appropriately increased, the temperature of the cleaning liquid can be increased, and the cleaning time can be prolonged.