Shenzhen Institute of Advanced Integration Technology, Chinese Academy of Sciences/The Chinese University of Hong Kong, China.
Ultrasonics. 2010 Apr;50(4-5):508-11. doi: 10.1016/j.ultras.2009.10.015. Epub 2009 Oct 24.
Multilayer ultrasonic transducers are widely being used for high power applications. In these applications, typical Langevin/Tonpilz structures without any adhesive bondings however have the disadvantage of limited bandwidth. Therefore adhesively-bonded structures are still a potential solution for this issue. In this paper, two-layer piezoelectric ceramic ultrasonic transducers with two different adhesive bondlines were investigated comparing to a single-layer transducer in terms of loss effects during operation with excitation signals sufficient to cause self-heating. The theoretical functions fitted to the measured time-temperature dependency data are compared with experimental results of different piezoelectric transducers. Theoretical analysis of loss characteristics at various surface displacements and the relationship with increasing temperature are reported. The effects of self-heating on the practical performance of multilayer ultrasonic transducers with adhesive bondlines are discussed.
多层超声换能器广泛应用于高功率应用。在这些应用中，典型的没有任何粘结的兰格文/通比茨结构然而具有带宽有限的缺点。因此，粘结结构仍然是解决这个问题的一个潜在方案。在本文中，两层压电陶瓷超声换能器与两种不同的粘结层进行了研究，与单层换能器相比，在激励信号足以引起自热的情况下，其在操作过程中的损耗效应。对测量的时-温相关数据拟合的理论函数与不同压电换能器的实验结果进行了比较。报道了在不同表面位移下的损耗特性的理论分析以及与温度升高的关系。讨论了粘结多层超声换能器自热对其实际性能的影响。
