（Wuhan University of Technology, Wuhan 430070）

Abstract:Porous piezoelectric PZT ceramics were fabricated by BURP, and PMMA/PZT piezoelectric composites were prepared by in-situ polymerization method. The morphology of composites was observed and the effects of the PZT volume content on the piezoelectric and dielectric properties of the composites were studied. The results indicated that the composites have some pores, and the electric parameters of the composites nonlinearly increase with the increasing of the volume content of PZT. Their d₃₃ attains 98 PC/N, when the composites contain 90vol% PZT.

Keywords:PMMA/PZT, dielectric property, piezoelectricity