piezoelectric ceramics, also known as ultrasonic energy exchange plates, piezoelectric energy exchange plates, piezoelectric ceramics are ceramics with piezoelectric effect, known as piezoelectric ceramics. It is an indispensable part of modern electronic technology. Piezoelectric ceramics are widely used in modern communication, radar, sonar, automatic measurement and control, ultrasonic energy exchange, ignition detonation, ultrasonic sterilization, ultrasonic power and so on. It has a strange characteristic of piezoelectric effect, that is, when subjected to a small external force, it can turn mechanical energy into electrical energy, and when coupled with alternating voltage, it will turn electrical energy into mechanical energy.
PZT piezoelectric ceramics (lead zirconate 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 is the lead dioxide, lead zirconate, lead titanate sintered at 1200 degrees of high temperature polycrystal. It has positive piezoelectric effect and negative voltage electric effect.
PZT piezoelectric ceramics are the solid solution of PbZrO3 and PbTiO3 with perovskite structure. PbTiO3 and PbZrO3 are typical representatives of ferroelectrics and antiferroelectrics, because Zr and Ti belong to the same subgroup, PbTiO3 and PbZrO3 have similar spatial lattice forms, but their macroscopic characteristics are very different. Lead titanate is a ferroelectric with a Curie temperature of 492℃, while lead zirconate is an antiferroelectric. The Curie temperature is 232 ° C, and such a large difference has caused a lot of concern.
After 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.
Emission circular piezoelectric energy changer, this type of component has low strong field loss, high mechanical quality factor, high power density, used for high voltage and high pressure drive; High-power emission and powerful ultrasonic transducer; Widely used in ultrasonic cleaning, ultrasonic welding and other ultrasonic power equipment, emission type circular piezoelectric ceramic components produced by Corson are widely used in ultrasonic cleaning, fusion welding, power ultrasound, underwater acoustic emission and other fields.
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