流延法制备0-3型PZT/PVDF压电复合膜的微观结构及性能

Microstructure and Properties of 0-3 PZT/PVDF Piezoelectric Composite Film Prepared by Doctor-Blade Casting Process

采用流延法制备了不同配比的0-3型PZT/PVDF压电复合膜材料,利用扫描电镜观察微观组织,用X射线衍射仪进行物相分析,并研究了PZT与PVDF的配比对压电复合膜材料压电性能的影响。结果表明:流延法制备的0-3型PZT/PVDF压电复合膜材料的结构均匀致密,无杂质相,PZT的分散性良好;随着PZT体积分数的增加,PZT/PVDF压电复合膜材料的压电常数、介电常数、介电损耗、机械品质因数均逐渐增大;在1kHz的测试频率下,当PZT体积分数达到70%时,复合材料综合性能最佳。

0-3 PZT/PVDF piezoelectric composites with different volume percentage of PZT were prepared by doctor-blade casting process. The microstructure of these piezoelectric composites were observed by scanning electron microscopy （SEM）, and X-ray diffraction （XRD） was used to analyze phase composition. The influence of PZT volume percentage on piezoelectric properties was also studied. The results show that the prepared piezoelectric composites had uniform and dense structure, no impurity phases, and good dispersity of the PZT. The piezoelectric constant, dielectric constant, dielectric losses and mechanical quality factor of these piezoelectric composites increased with the increase of PZT volume percentage. The combination property of the composite was best when PZT volume percentage was 70% at test frequency of 1 kHz.