The electromechanical coupling factor (K ²) is a key parameter in acoustic devices that acquaints the affect of piezoelectricity on the phase velocity of elastic waves. For conventional engineering applications, greater electromechanical coupling factor (K ²) are expected in surface acoustic wave (SAW) devices. This present study investigates the impact of microstructures and viscous liquid loading on transference of Love-type surface wave in a prestressed piezoelectric smart material layered structure. A micropolar material as substrate is employed for capturing the microstructural influence. The study involves the extraction of dispersion equations for both electrically open and short conditions depicting explicitly the effects of viscosity and density of viscous liquid, microstructural parameters of the substrate, electromechanical coupling factor and material parameters of the prestressed piezoelectric layer. Some particular cases of the problem are derived and the obtained results are matched with the classical Love wave equation. PZT − 5H ceramic material as piezoelectric material and Aluminium-Epoxy as micropolar material, are considered for the investigation. The present study is meaningful in intensifying the performance of chemical and biochemical sensors working in a liquid environment.

机电耦合因子 ( K ² ) 是声学器件中的一个关键参数，它了解压电性对弹性波相速度的影响。对于常规工程应用，更大的机电耦合系数 ( K ²) 预计在表面声波 (SAW) 设备中使用。本研究调查了微结构和粘性液体载荷对预应力压电智能材料层状结构中 Love 型表面波传递的影响。采用微极性材料作为基材来捕捉微观结构的影响。该研究涉及提取电开路和短路条件下的色散方程，明确描述粘性液体的粘度和密度、基板的微观结构参数、机电耦合因子和预应力压电层的材料参数的影响。推导出了该问题的一些特殊情况，并将得到的结果与经典的 Love 波动方程相匹配。PZT − 5 H陶瓷材料作为压电材料，铝环氧树脂作为微极性材料，被考虑用于研究。本研究对于加强在液体环境中工作的化学和生化传感器的性能具有重要意义。