When some dielectrics are deformed by an external force in a certain direction, polarization occurs inside them, and positive and negative opposite charges appear on the two opposite surfaces thereof. When the external force is removed, it will return to the uncharged state. This phenomenon is calle

Piezoelectric crystal transducer are widely used in the fields of electronics, light, heat, and acoustics, and have become important functional materials in the defense industry, civil industry, and daily life. They are a major research direction of current functional materials. At present, the most

With the propagation of ultrasonic vibration in the medium, its essence is the mechanical vibration is propagating in the elastic medium in the form of wave, it is generally considered that its frequency should be above 20 kHz. Ultrasonic non-destructive testing commonly used at 0 4 to 5 MHz. Ultras

The higher-grade lighters are not equipped with flint inside, and their ignition devices are similar, most of which are ignited by piezoelectric ceramics through tip discharge. Some solid dielectrics have a special phenomenon due to the special structure of the lattice. That is, when the piezo cryst

Piezoelectric ceramic hydrophones have a wide range of applications in sonar due to their flatness, stable performance and simple structure. The main failure mode of piezoelectric ceramic hydrophones is the reduction in the insulation resistance. The average insulation resistance of the hydrophone i

Piezoelectric material is a special dielectric material with piezoelectric effect and inverse piezoelectric effect. The piezoelectric effect is the characteristic of some piezo crystals discovered by the French P. Curie and J. Curie brothers in 1880. When a piezoelectric force exerts a mechanical fo

The application of the positive piezoelectric effect is mainly used for gas igniters, such as gas stoves. Ignition system for gas lighters, etc. The basic working principle is: compressing a spring by an external force, releasing it after pressing to the apex, and the spring force pushes a heavy ham

Application of piezoelectric ceramics transducerPiezoelectric ceramics have been widely used due to their piezoelectricity and the resulting diversity of electromechanical properties. These applications can generally be divided into two broad categories, namely as piezoelectric vibrators. When is us

Piezoelectric ceramic is a polycrystalline film with piezoelectric effect, and its production process is named after its similar production process (raw material pulverization, molding, high temperature sintering). Some anisotropic piezo crystals undergo deformation under mechanical force, causing t

Piezoelectric ceramics have occupied a considerable proportion in the field of electronic materials and have been widely used. For different applications of piezoelectric ceramics, the requirements for piezoelectric parameters are also different. For example, in power transducers - liter On the piez

1 domain motionIn the Pb (Zr0. 52Ti0. 48)O3 PZT material piezoelectric ceramics composition, the addition of oxides such as La2O3, Nb2O5, ThO2 and WO3 reduces the Qm value . To explain the Qm reduction, it proposed the following mechanism. When is replacing Pb2 + , Ti4 + , Zr4 + in PZT ceramics with

Ultrasonic motor is a new type of motor driven by piezoelectric ceramic excitation ultrasonic wave. It has the advantages of low speed and large torque, low inertia, fast response and no interference from magnetic field. Due to the above advantages of ultrasonic motor, ultrasonic motor technology ha

They are each applied to different components. It has a high coupling coefficient and dielectric constant ,small dielectric loss. These characteristics of PZT material piezoelectric ceramics determine the material is suitable for ultrasonic hydrophone emission transducer and high voltage generating

Due to the piezoelectric effect, piezoelectric ceramics can directly convert non-electricity into electricity, and its piezoelectric constant can be greatly improved by adjusting the composition of the composition or changing the combination of piezoceramic sheets, thereby effectively improving its