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本文从理论上和实验上研究了AT切型石英振子耦合T型波的频谱分析和能陷判据。在理论部分,引入两个等效应力(T_1=γ_(11)S_1和T_5=γ_(55)S_5),再计入电极区和非电极区的边界条件,以及电极质量负载效应和压电效应等,即可得到描述T型波传播特性的方程组。从这些方程组出发,我们计算了耦合T型波的频谱,给出了有限电极条件下厚度-切变模和厚度-扭曲模的能陷判据,并得到了最佳矩形电极尺寸与弹性常数的关系。在实验部分,分别测量了不同电极尺寸和质量负载条件下,基频约为30MHz和100MHz的AT切型石英振子的频谱。实验结果与理论结果相符。最后,还用上述理论设计制成了单频性很好的高频石英谐振器。 相似文献
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THE THERMAL BEHAVIOR OF TWO-COMPONENT PIEZOELECTRIC SINGLE CRYSTAL ALUMINIUM GALLIUM PHOSPHATE Al1-xGaxPO4 下载免费PDF全文
The temperature properties of elastic, piezoelectric and dielectric constants for the single crystal Al0.88Ga0.12PO4 have been studied in detail over a temperature range from 150 to 410K. And two crystal plates with different orientations which have zero temperature coefficient are introduced. As might have been expected, the single crystal Al1-xGaxPO4 is a new kind of materials applicable to the surface acoustic wave devices. 相似文献