Abstract—

An approach to modeling a ferroelectric heterostructure with a prestressed coating made of a two-component functional-gradient material is proposed. Various types of PZT-based ceramics with close values of elastic moduli and significant differences in piezoelectric and dielectric parameters are considered as coating materials. The initial stress state (ISS) of the coating is caused by the action of an electric field and uniaxial mechanical tension. By the example of the problem of the propagation of sh-waves, the influence of the initial electrostatic field on the features of the SAW propagation has been investigated for various ratios of the parameters of the coating materials and the nature of the inhomogeneity localization.

中文翻译：

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静电场对预应力铁电异质结构中锯的影响

摘要-

提出了一种使用由两组分功能梯度材料制成的预应力涂层对铁电异质结构进行建模的方法。各种具有弹性模量值接近且压电和介电参数差异显着的PZT基陶瓷被视为涂料。涂层的初始应力状态（ISS）是由电场和单轴机械张力的作用引起的。以sh波的传播问题为例，研究了初始静电场对声表面波传播特性的影响，涉及涂层材料参数的各种比率和非均匀性局部化的性质。