面向水声换能器的压电单晶复合材料设计研究

压电单晶复合材料具有高压电常数、高机电耦合系数和高水声优值的优点,是制备下一代高性能水声换能器的关键材料。不同类型水声换能器对压电材料的性能要求不同,如何根据器件的具体应用需求,对压电单晶复合材料的结构和性能进行设计具有重要的意义。为了能够准确选取压电单晶复合材料中压电相与聚合物相两相材料特性、体积分数、宽高比等参数,本文提出了一种将解析模型与数值模型相结合的综合设计方法。实验结果证实,该方法可以准确高效地预测1-3型压电单晶复合材料的振动模态及宏观等效性能参数,实现以器件性能为指导的压电单晶复合材料设计。

Design Research of Piezoelectric Single Crystal Composites for Underwater Acoustic Transducer Applications

Piezoelectric single crystal composites(PSCCs)are important materials for preparing underwater acoustic transducers because of their high piezoelectric coefficients,electromechanical coupling factors and figure-of-merit.However,different types of underwater acoustic transducers have different requirements for piezoelectric materials,therefore,it is of great significance to design the structure and performances of PSCCs according to the specific application requirements of underwater acoustic transducers.In order to accurately select the parameters of piezoelectric phase and polymer phase,such as material properties,volume fraction,aspect ratio,et al,a design approach with a combination of analytical model and numerical model was proposed.Experimental results confirmed that this approach can accurately and efficiently predict the vibration modes and macroscopic equivalent performances of the 1-3 PSCCs.The present study provides a guideline from the underwater acoustic transducers to the PSCCs.