The word is derived from the Greek word piezein means press or squeeze. It was first observed by Jacques and Pierre Curie when certain crystals were subjected to strain ,they become electrically polarized and degree of polarization was proportional to the applied strains. Such materials are widely used in electromechanical transducers. This effect of converting mechanical energy into electric energy is observed in natural crystals like quartz, tourmaline etc. It is also prominenet in ceramics like PZT. ZnO is used in MEMS as sensors and acuators and numeber of papers are available in literaure on these applications.
yes, i agree as prasanthi quoted. We can also try for fabrication of nano PECs arrays to go power generation
Piezoelectric ceramics, single crystal and film find potential applications in a variety of applications, daily use consumer electronics to sophisticated electronic components.
Important characteristic of a piezoelectric material.
1) It should below to the non centrosymmertic classof crystals,
Most ferroelectric compositions are piezoelectric. In polycrystalline sample (like PZT, BaTiO3) etc.,you must pole the ceramic, whereas in a single crystal you must cut the cut crystal and use the correct orientation (e.g., LiNbO3, PMN,) etc.
and there are some non ferroelectric material like ( Quartz, ZnO, AlN) etc., which are non ferroelectric but show reasonable piezoelectric. In this materials the piezoelectricity observed depends on the specific orientation. So you must prepare these materials with the reight orientation to tap the piezoelectric properties, and in order to determin the crystal axis orientation you can use the XRD methods. Piezoelectric properties can be anisotropic, and can depend on the crystal face orientation.
K. Sreenivas
Most commonly used daily applications include:
cigarette lighters
LPS gas stove lighters.
Buzzers and alarms
Misical Birthday card chips.
Ultrasonic cleaners.
Infrared burglar alarms
you can find all the above in daily life, which are quite cheap.
K. Sreenivas
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