PIEZO SYSTEMS, INC.
Piezo Systems Corp.
Advanced piezoelectric Materials and Components
Physikinstrumente (Germany) - very good information about piezo actuators and positioning systems.
the UK's national standards laboratory, who look after the basic units of measurement such as time, mass and length which ensure consistency and traceability of measurements.
Discusses the historic background, piezoelectric constants, soft versus hard ceramics, behavior of elements, resonance frequencies, applications, new materials and applications.
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