PZT基陶瓷纤维性能对1-3复合材料性能影响

Effects of properties of the PZT-based ceramic fibers on properties of 1-3 composites

采用塑性聚合物方法制备了高可塑性、高密度和高生坯强度的PZT5、PMnS、PBS陶瓷纤维，通过排列浇注法制备了1-3复合材料，研究了不同组成陶瓷纤维对复合材料性能的影响。结果表明，复合材料的介电常数、声阻抗和品质因数均比相应的陶瓷性能小了一个数量级，压电应变常数d33和平面机电藕合系数kp不同程度降低，但是压电电压常数g33和厚度机电藕合系数反大幅度增加，使得1-3复合材料的各相异性明显增强，复合材料的性能变化规律同压电纤维性能的变化规律相同，因此可通过改变纤维相性能而改善复合材料的性能。

PZT5, PMnS, PBS ceramic fibers with high plasticity, density and strength of the green body were fabricated by the viscous polymer processing（VPP） method and the 1-3 composites were prepared by the arrange-and-cast method. The effects of different fibers on the properties of the 1-3 composites were studied. The results show that the dielectric constant, acoustic impedance and mechanical quality factor were much smaller than the pure ceramic respectively, the piezoelectric strain constant d33 and radial coupling coefficient kp were decreased, but the piezoelectric voltage constant g33 and thickness coupling coefficient kt were increased greatly, thus enhancing the anisotropy of the 1-3 composites. The properties of the 1-3 composites are followed with the properties of the piezoelectric fibers, so the properties of the 1-3 composites can be improved by enhancing the properties of the fibers.