Article List

• Non-destructive testing technology and its application (4)

  Ultrasonic diffraction and scattering characteristics:When the ultrasonic wave propagates through the medium, it encounters a heterogeneous interface (such as a defect). According to the huygens principle, a diffraction phenomenon occurs at the edge thereof, and a newly excited diffraction wave is g

  Basics of Piezoelectric Ceramics September 23, 2019
• Non-destructive testing technology and its application (3)

  The high-frequency pulse circuit of the ultrasonic flaw detector generates a high-frequency pulse oscillating current to be applied to the piezoelectric ceramic crystal in the ultrasonic transducer (probe), which excites the ultrasonic wave and transmits it to the workpiece to be inspected, and when

  Basics of Piezoelectric Ceramics September 23, 2019
• Non-destructive testing technology and its application (2)

  The sensor rod acts as a mechanical resonator and is inserted into the feedback circuit of the excitation amplifier. Under the action of the excitation coil, the sensor rod generates longitudinal ultrasonic vibration. The signal is detected by the piezoelectric wafer and is positively fed back to th

  Basics of Piezoelectric Ceramics September 20, 2019
• Non-destructive testing technology and its application (1)

  Sound wave is a kind of longitudinal wave that can be felt by the human ear. Its frequency range is 16Hz~2KHz. When the frequency of sound waves is lower than 16 Hz, it is called infrasound wave, and when it is higher than 2 kHz, it is called ultrasonic wave. Generally, sound waves are having a freq

  Basics of Piezoelectric Ceramics September 20, 2019
• Dynamics Research Of Piezoelectricity Tube

  Piezoelectric ceramics are a type of crystal material that undergoes a shape change such as compression or elongation when subjected to mechanical stress. As the shape changes, different charges are generated on both sides of the crystal. Conversely, adding a different voltage across the linear piez

  Basics of Piezoelectric Ceramics September 19, 2019
• New developments piezo ceramics used in the underwater sonar transducers(2)

  Composite vector hydrophoneIn order to improve the detection performance of passive sonar, research has developed a vector hydrophone that can receive and utilize scalar parameters (sound pressure) and vector parameters (vibration speed) in the sound field, making full use of the information in the

  Basics of Piezoelectric Ceramics September 18, 2019
• New developments piezo ceramics used in the underwater sonar transducers

  Transducer is an important part of sonar. From the perspective of the history of hydroacoustics, every step of the development of underwater acoustics is inseparable from the development of transducer technology. Since hydroacoustic transducers play a key role in underwater acoustic engineering, man

  Basics of Piezoelectric Ceramics September 18, 2019
• Application of piezoelectric ceramics in the new fields(2)

  Piezoelectric transformerPiezoelectric transformers have been developed since the 1950s, but they were not commercialized until the 1990s. The successful application of piezoelectric transformers, on the one hand, the advancement of materials is the use of sub-micron fine PZT piezo ceramic materials

  Basics of Piezoelectric Ceramics September 16, 2019
• Application of piezoelectric ceramics in the new fields(1)

  Since the Curie brothers discovered the piezoelectric effect of tourmaline in 1880, the history of piezoelectrics ceramics began from quartz and BaTiO3, ceramics have played an important role in the history of piezoelectrics. However, after the discovery of PZT piezoelectric ceramics, the speed of a

  Basics of Piezoelectric Ceramics September 16, 2019
• Principle, structure and characteristics of PZT piezoelectric ceramic actuator

  A piezoelectric ceramic actuator is a device that utilizes the inverse piezoelectric effect of a piezoelectric ceramic to apply an electric field in an appropriate direction of the piezoelectric ceramic to generate a corresponding displacement and force. When a voltage is applied to the polarized pi

  Basics of Piezoelectric Ceramics September 12, 2019