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Piezoelectric Ceramics Parameter

Views:21     Author:Site Editor     Publish Time: 2017-03-13      Origin:Site

The piezoelectric ceramics were first discovered on barium titanate, but due to the difficulty of sintering pure barium titanate ceramics, and the Curie point (120 ), near room temperature (about 5 ) phase transition occurred, even if Change its doping characteristics, the piezoelectricity is still not high. In 1950, the name of PbZrO3-PbTiO3 (referred to as: PZT) is by far the most used piezoelectric ceramics.

Piezoelectric ceramic has the advantage of its anti-acid and alkali, high electromechanical coupling coefficient, easy to form any shape, cheap; piezoelectric ceramic shortcomings of its temperature coefficient, there is a certain hysteresis, creep and non-linear, high-pressure polarization deal with. At the same time, according to the type of piezoelectric ceramic composition can be divided into one yuan to multiple series of piezoelectric ceramics, its performance is very different.

Because piezoelectric ceramics and piezoelectric ceramics have piezoelectric function and electrostrictive effect of such special features, and thus in modern technology has a wide range of applications, such as piezoelectric sensors, piezoelectric transformers, piezoelectric electro-acoustic transducer, pressure Crystal oscillator, piezoelectric micro - displacement mechanism.

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