Piezoelectric ceramics are also called ultrasonic transducers and piezoelectric transducers. Piezoelectric ceramics are ceramics with piezoelectric effect, called piezoelectric ceramics. It is an indispensable and important part of modern electronic technology. Piezoelectric ceramics are widely used in modern communications, radar, sonar, automatic measurement and control, ultrasonic energy conversion, initiation, ultrasonic sterilization, ultrasonic power, etc. It has a unique piezoelectric effect, that is, when receiving a small external force, it can convert mechanical energy into electrical energy, and when an AC voltage is applied, it can convert electrical energy into mechanical energy.
PZT piezoelectric ceramics (lead zirconium titanate titanate): where P is the abbreviation of lead element Pb, Z is the abbreviation of zirconium element Zr, T is the abbreviation of titanium element Ti, PZT piezoelectric ceramics are lead dioxide, lead zirconate , Lead titanate is a polycrystalline sintered at a high temperature of 1200 degrees. It has positive piezoelectric effect and negative piezoelectric effect.
PZT piezoelectric ceramics are solid solutions of PbZrO3 and PbTiO3 with a perovskite structure. PbTiO3 and PbZrO3 are typical representatives of ferroelectrics and antiferroelectrics. Since Zr and Ti belong to the same subgroup, PbTiO3 and PbZrO3 have similar spatial lattice forms, but their macroscopic properties are quite different. Lead titanate is a ferroelectric with a Curie temperature of 492°C, while lead zirconate is an antiferroelectric with a Curie temperature of 232°C. Such a huge difference has caused widespread concern.
By studying the solid solution of PbTiO3 and PbZrO3, it is found that PZT has better piezoelectric and dielectric properties than other ferroelectrics. PZT and doped PZT series ferroelectric ceramics have become the focus of research in recent years.
Transmit a circular piezoelectric transducer, the element has low strong field loss, high mechanical quality factor, high power density, used for high voltage and high voltage drive; high power transmission and powerful ultrasonic transducer; ultrasonic such as cleaning Ultrasonic power equipment such as ultrasonic welding is widely used. Corson's emitting circular piezoelectric ceramic components are widely used in ultrasonic cleaning, fusion welding, power ultrasonic and hydroacoustic emission.