Microstructure and Properties of Piezoelectric Composites Filled with Ferroelectric Ceramic Particles

Piezoelectric composites with different contents of ferroelectric ceramic particles(PZT) were prepared by Mould Compression Technique.Curing parameters of the composite were analyzed and determined by TG DTA, then its microstructure and properties were investigated. Test results showed that the corresponding electric parameters increased gradually with increasing of PZT. When the PZT is up to 85 %, the dielectric constant e and the piezoelectric constant d 33 reach their maximum. And the well distribution was found in the composites with ferroelectric ceramic particle inclusion. The less the content of PZT is, the better the adhesion of interface between the two phases gets. When the PZT reaches 90 %, significant increase in the pore was found, which leads to the decrease of the dielectric and piezoelectric constants of composites.