Piezoelectric Ceramics

Abstract

Surface acoustic wave filters and delay lines are two application in electronics of piezoelectric ceramics such as LiNbO3 LiTaO3 and BaTiO3, materials which convert a mechanical stimulus into an electrical signal. The basic physics and crystal chemistry of the materials, including ferroelectric ceramics, are described and an outline for further development given.

Interdigital sensors and transducers

“…It is the most commonly used ceramic piezoelectric substrate. Reference [71] discusses in detail the properties of PZT and other ceramic piezoelectric substrates. The major disadvantages of PZT are relatively low mechanical properties, temperature dependence, and exhibition of aging when approaching the Curie temperature [72].…”

Building submicron crystalline piezoceramics: One‐step pressureless sintering partially amorphized nanopowder

“…Piezoceramics play an essential role in technology developments in many areas, such as ultrasound transducers, multilayer actuators, piezoelectric motors, and sensors, to name a few . Recently, motivated by the market demand for the miniaturization of piezoelectric devices, there is an urgent need to develop piezoceramics having a fine‐grained structure and having excellent electrical properties .…”

Domain Engineering of Lead‐Free Li‐Modified (K,Na)NbO3 Polycrystals with Highly Enhanced Piezoelectricity

“…It is known that poling is an important process to endow ferroelectric polycrystals with macroscopic piezoelectric responses, by applying a high electric field of up to several thousand volts per millimeter. [18] Inferior ferroelectric responses are obtained by insufficient poling, which is caused by various factors, such as defects. These defects can form an internal field that provides a driving force to switch the aligned domains back to their initial randomly distributed states.…”