The piezoelectric ceramic material is between PZT8 and PZT5, taking into account the characteristics of both, has high sensitivity, and has low dielectric loss, and has low transmission power and can be used as a transceiver for receiving and receiving at the same time. , It is appropriate to choose this material. At present, ultrasonic atomization transducers produced with this piezoelectric ceramic material have been put into mass production.
  Piezoelectric ceramics, also known as transducers, are an indispensable and important part of modern electronic technology. Piezoelectric ceramics are used in modern communications, radar, sonar, automatic measurement and control, ultrasonic energy conversion, ignition and detonation, and ultrasonic sterilization. , Ultrasonic power and other aspects have been widely used. At present, the development of piezoelectric ceramic materials and their applications in my country is still in the development stage, and the development of this industry will have broad prospects.
When a voltage is applied to a piezoelectric ceramic, a piezoelectric ceramic sheet will produce mechanical deformation with changes in voltage and frequency. On the other hand, when the piezoelectric ceramic is vibrated, an electric charge is generated. Using this principle, when an electric signal is applied to a vibrator composed of two piezoelectric ceramics or a piezoelectric ceramic and a metal sheet, so-called bimorph element, ultrasonic waves will be emitted due to bending vibration. On the contrary, when ultrasonic vibration is applied to the piezoelectric bimorph element, an electrical signal is generated. Based on the above effects, piezoelectric ceramics can be used as ultrasonic sensors.



Piezoelectric ceramics have a variety of different principles in the conversion process. From the current situation, the piezoelectric ceramics are basically converted effectively through the action of sound waves, and the actual conversion of these piezoelectric ceramics In the process, it will be able to generate more inductive loads, and can even be converted by the piezoelectric effect of piezoelectric ceramics. In the actual conversion, more vibrations can be generated, and more acoustic waves will be emitted. Of course Among them, the entire piezoelectric ceramic conversion also has different conversion work, and there will be more standards for use.


Piezoelectric ceramic sheet is a kind of electroacoustic device with simple structure and light weight. It has the advantages of high sensitivity, no magnetic field spreading, no copper wire and magnet, low cost, low power consumption, convenient repair, and convenient mass production. widely used. Suitable for the transmission and reception of ultrasonic and infrasonic waves. Piezoelectric ceramics with a relatively large area can also be used to detect pressure and vibration. The working principle is to use the reversibility of the piezoelectric effect. Applying audio voltage on it can generate mechanical vibration, thereby Make some noise. If pressure is continuously applied to the piezoelectric ceramic sheet, it will also generate voltage and current.

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PiezoelectricCeramics (PZT) materials are categorized as functional ceramics. In sensors they make it possible toconvert forces, pressures and accelerations into electrical signals, and in sonic and ultrasonic transducers and actuators they convert electric voltages into vibrations or deformations.PiezoelectricCeramics materials are classified according to their chemical composition on the one hand, and by the specific application conditions on the other.

In order to improve the reliability of piezoelectric ceramics, we usually use metal shell packaging to reduce the lateral force that external mechanical structures may bring to piezoelectric ceramics. However, even if piezoelectric actuators that use shell packaging are used, it is necessary to go deeper Understand the technical background of piezoelectric ceramic applications, and ensure high reliability through appropriate design and operation.
Even if the structure of the piezoelectric system has proven to be reliable, any seemingly minor changes need to be re-evaluated. In some practical applications, the reliability of piezoelectric ceramics is often discussed under the following two extreme conditions.
Every link in the operation process must be strictly controlled, through actual testing and evaluation procedures, to avoid overloading, unreasonable mechanical structure, mechanical compensation and correction of inappropriate driving conditions, so as to achieve high reliability.
Piezoelectric ceramics can output performance based on limited parameters in a short time, but we would not recommend this method. When long-term reliability, long-term work and high duty cycles are necessary conditions, the successful short-term test of a piezoelectric system does not mean that it is equally safe and reliable for long-term use. Incorrect operation will not immediately damage the piezoelectric ceramics, but will reduce long-term reliability and fail to achieve the expected working cycle.
The reliability of piezoelectric ceramics is affected by the mechanical structure of the load, drive control, and operating environment and other conditions; in most applications, due to cost reasons, users often want to use piezoelectric ceramics as small as possible. Electroceramic components have become the weakest link in many mechanical design structures. In addition, piezoelectric ceramics are a relatively complex material and very sensitive. Improper handling can easily cause damage.

Application
1. ultrasonic cleaning trasnducer
2. ultrasonic welding tansducer
3. ultrasonic beauty transducer
4. ultrasonic underwater transducer
5. ultrasonic immersible transucer
6. ultrasonic screening transducer
7. ultrasonic cutting transducer
8. ultrasonic atomization transducer
9. ultrasonic emulsifier

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The piezoelectric ceramics are sensitive to external forces so that they can even sense the air disturbance caused by flying insects'flapping wings more than a dozen meters away and convert extremely weak mechanical vibrations into electrical signals. This characteristic of piezoelectric ceramics can be used in sonar system, weather detection, telemetry environmental protection, household appliances and so on.





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