Piezoelectric ceramics (piezoelectric ceramics) are also called 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 communication, radar, sonar, automatic measurement and control, ultrasonic energy conversion, ignition and detonation, ultrasonic sterilization, ultrasonic power, etc. .
It has a peculiar piezoelectric effect characteristic, that is, when subjected to a small external force, it can turn mechanical energy into electrical energy, and when an alternating voltage is applied, it turns 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 Lead titanate is a polycrystal sintered at a high temperature of 1200 degrees. It has a positive piezoelectric effect and a negative piezoelectric effect.
PZT is a solid solution of PbZrO3 and PbTiO3 and has a 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 the macroscopic characteristics of the two are quite different. Titanium Lead acid is a ferroelectric body with a Curie temperature of 492°C, while lead zirconate is an antiferroelectric body with a Curie temperature of 232°C. Such a large difference has caused widespread concern.
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