PI ‘Piezoelectric Effect’

This video shows the ‘Piezoelectric Effect’. The word "piezo" was derived from the Greek word for pressure. In 1880, Jacques and Pierre Curie discovered that pressure produces electrical charges in several crystals such as tourmaline and quartz; they named this phenomenon as the "piezoelectric effect". Later, they observed that electrical fields can deform piezoelectric materials. This effect is referred to as the "inverse piezoelectric effect".

As the piezoelectric effect is based on displacements in the crystal lattice of the piezoelectric ceramic, the motion creates no wear or friction and has a resolution of less than one nanometer. Today, the piezoelectric effect is used in numerous products such as loudspeakers lighters and signal transducers. Piezo actuator technology has also gained acceptance in automotive technology, because piezo-controlled injection valves in combustion engines decrease the transition times and considerably enhance the smoothness and exhaust gas quality.

Run Time – 0:27min

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