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将不同粒度的锆钛酸铅(PZT)陶瓷粉进行复配,制成不同粒度分布的PZT陶瓷颗粒,然后与聚偏氟乙烯(PVDF)复合制备不同PZT粒度分布的PZT/PVDF复合材料,研究了复合材料的介电性能和压电性能。结果表明,当陶瓷颗粒体积分数高达70%时,双峰分布复合材料的压电系数可达75 pC.N-1。这是由于双峰分布复合材料中大陶瓷颗粒保持了完整的钙钛矿结构,小陶瓷颗粒填充在大颗粒之间,陶瓷颗粒彼此联接,形成了更多的电-力耦合通道,有效地实现了压电效应的传递。大陶瓷颗粒完整的钙钛矿结构以及大、小颗粒的协同堆砌效应,提高了PZT/PVDF复合材料的电性能。
PZT ceramic powders with different particle sizes were compounded to prepare PZT ceramic particles with different particle size distributions. PZT / PVDF composite materials with different PZT particle size distributions were prepared by compounding with polyvinylidene fluoride (PVDF) The composite dielectric and piezoelectric properties. The results show that when the volume fraction of ceramic particles is as high as 70%, the piezoelectric coefficient of bimodal distribution composites reaches 75 pC.N-1. This is due to the fact that the large ceramic particles in the bimodal distribution maintain a complete perovskite structure, the small ceramic particles are filled between the large particles, and the ceramic particles are connected with each other to form more electro-mechanical coupling channels, which are effectively realized The piezoelectric effect of the transfer. The complete perovskite structure of large ceramic particles and the synergistic piling effect of large and small particles improve the electrical properties of the PZT / PVDF composite.