Pressure Electricity (see below)
Piezoelectric materials produce a charge proportional to an applied stress, as first discovered in 1880 by Jacques and Pierre Curie, and are natural sensor and electrical generator materials. The converse piezoelectric effect, as utilised in actuator applications, describes the deformation of the material in response to an applied electric field.
Research into what we now loosely term "electroceramics" (ferroelectric polycrystalline ceramics) began during World War II with the search for improved capacitor dielectrics. It was found that barium titanate (BaTiO3) and latterly lead zirconate titanate, known as PZT (Pb(Zr1?xTix)O3), possessed much improved dielectric and piezoelectric properties compared to quartz. These materials can be electrically powered by low cost, low power amplifiers and hence cost effective actuators and sensors became a reality.
Today there are a myriad piezoelectric compositions and material variants facing the application engineer. By alteration to the key electromechanical properties, materials can be easily tailored to an application to operate at a desired voltage, frequency or stress etc.
ECERTEC PIEZO PRODUCTS AND SERVICES
We also develop and supply or license ultra high purity electroceramic powders
Piezoelectric PZT, Relaxor Ferroelectric PMN & PMNT and Electro-Optic PLZT Materials designed developed and supplied.
Ecertec Ltd. is a spin-off company from The University of Leeds. UK.
Tel: +44 (0)113 245 7361 Fax: +44 (0)113 245 0438
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Ecertec Piezoelectric Glossary