陶瓷体积分数对压电换能器性能影响

Effect of Ceramic Volume Fraction on the Performance of Piezoelectric Transducers

研究了压电陶瓷体积分数(vc)对1-3型压电复合材料换能器收发性能的影响。换能器的收发性能主要由发射电压响应和接收灵敏度来衡量。通过有限元仿真和实验,分析了换能器的接收灵敏度和发射响应随压电陶瓷体积分数变化的规律,并将实验与有限元计算结果进行对比,二者基本吻合。实验和仿真结果表明,当陶瓷体积分数vc<0.4时,换能器的发射电压响应呈增长趋势;当vc=0.4~0.7时,发射电压响应趋于稳定值(173dB)。当vc=0.2~0.4时,接收灵敏度呈增长趋势,在vc在0.4附近达到-180.4dB;当vc=0.4~0.6时,接收灵敏度逐渐减小。

The influence of the piezoceramic volume fraction ( v c ) on the performance of the 1-3 piezoelectric composite transducer is studied. The transceiver performance is mainly measured by the transmitting voltage response and receiving sensitivity. Through the finite element simulation and experiment, the law of the transducer’s receiving sensitivity and transmitting response varying with the volume fraction of piezoelectric ceramics is analyzed, and the results of experiment and finite element calculation are compared, which are basically in agreement with each other. The experimental and simulation results show that when v c <0.4, the transmitting voltage response of the transducer shows a growing trend. When v c is between 0.4 and 0.7, the transmitting voltage response tends to a stable value of 173 dB. When v c is between 0.2 and 0.4, the receiver sensitivity shows an increasing trend. When v c is around 0.4, it reaches -180.4 dB;while when the v c is between 0.4 and 0.6, the receiving sensitivity gradually decreases.