piezoelectric ceramics

Piezoelectric ceramics are advanced materials that exhibit unique electrical properties when subjected to mechanical stress or an electric field. The term "piezoelectricity" literally means "pressure electricity".12

Key Properties and Applications:

• Direct Piezoelectric Effect: When mechanical stress (like squeezing, bending, or twisting) is applied to a piezoelectric material, it generates an electric voltage. This effect is used in devices like gas igniters and pressure sensors.12
• Converse Piezoelectric Effect: Conversely, when an electric field is applied to a piezoelectric material, it causes a change in its dimensions, essentially deforming it. This is utilized in applications such as ultrasound transducers for medical imaging and sonar, as well as precision positioning systems.12

Many piezoelectric ceramics, such as lead zirconate titanate (PZT), are also ferroelectric, meaning they possess a permanent electric polarization that can be influenced by an external electric field. This dual nature makes them valuable in a wide range of electronic and mechanical devices, from precise clocks to musical instruments.21