Abstract
Piezoelectric ceramics are good candidate materials for sensor and actuator applications, because of its ability to convert mechanical energy to electrical energy and vice versa. The response speed of Electro-mechanical converting signal in piezoelectric transducers is up to a few hundreds kilohertz. Therefore, they are widely used in vibration and acoustic system. In these applications, the nonlinearity of the materials is a main factor to consider when one designs the control system. In this paper, the nonlinearity of electro-mechanical coupling of PbZrxTi(1-x)O3 was investigated. Experimental results showed that the piezoelectric properties of PZT are greatly affected by the sequence and the amplitude of the applied voltage.
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