Wang Yiwei, Xu Xiaomei, Li Li
College of Automobile and Traffic Engineering, Nanjing Forestry University, Nanjing 210037, China.
Materials (Basel). 2023 Sep 19;16(18):6285. doi: 10.3390/ma16186285.
Bandgaps of traditional phononic crystals (PCs) are determined using structural geometric parameters and material properties, and they are difficult to tune in practical applications. Piezoelectric PCs with lead zirconium titanate piezoelectric ceramics (abbreviated to piezoelectric PCs) have multi-physics coupling effects and their bandgaps can be tuned through external circuits to expand the application range of the PCs. First, the typical structures of piezoelectric PCs are summarized and analyzed. According to the structure, common tunable piezoelectric PCs can be roughly divided into three categories: PCs that only contain piezoelectric materials (single piezoelectric PCs), PCs composed of embedded piezoelectric materials in elastic materials (composite piezoelectric PCs), and PCs that are composed of an elastic base structure and attached piezoelectric patches (patch-type piezoelectric PCs). Second, the tuning methods of bandgaps for piezoelectric PCs are summarized and analyzed. Then, the calculation methods of the bandgaps of piezoelectric PCs are reviewed and analyzed. Finally, conclusions are drawn on the research status of piezoelectric PCs, shortcomings of the existing research are discussed, and future development directions are proposed.
传统声子晶体（PCs）的带隙是通过结构几何参数和材料特性来确定的，并且在实际应用中难以调节。含有钛酸铅锆压电陶瓷的压电声子晶体（简称为压电PCs）具有多物理场耦合效应，其带隙可以通过外部电路进行调节，以扩大声子晶体的应用范围。首先，对压电PCs的典型结构进行了总结和分析。根据结构，常见的可调谐压电PCs大致可分为三类：仅包含压电材料的声子晶体（单压电PCs）、由嵌入弹性材料中的压电材料组成的声子晶体（复合压电PCs）以及由弹性基础结构和附着的压电贴片组成的声子晶体（贴片型压电PCs）。其次，对压电PCs带隙的调节方法进行了总结和分析。然后，对压电PCs带隙的计算方法进行了综述和分析。最后，对压电PCs的研究现状得出结论，讨论了现有研究的不足，并提出了未来的发展方向。
