The electroacoustic performance of 1-3 piezoelectric composite transducers with low loss polymer filler was studied and compared to monolithic Pb(Zr,Ti)O3 (PZT) piezoelectric transducers. The 1-3 composite transducers exhibited significantly high electromechanical coupling factor (kt ∼ 0.64) when compared to monolithic counterparts (kt ∼ 0.5), leading to the improved bandwidth and loop sensitivity, being on the order of 67% and −24.0 dB versus 44% and −24.8 dB, respectively. In addition, the acoustic output power and transmit efficiency (∼50%) were found to be comparable to the monolithic PZT transducers, demonstrating potential for broad bandwidth, high power ultrasonic transducer applications.
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机译：研究了具有低损耗聚合物填料的1-3压电复合换能器的电声性能，并将其与整体式Pb（Zr，Ti）O3（PZT）压电换能器进行了比较。与单片对应物（kt exhibit〜counterpart0.5）相比，1-3个复合换能器表现出显着高的机电耦合系数（kt〜0.64），从而导致带宽和环路灵敏度提高，分别为44％和67％和-24.0 dB ％和-24.8 dB。此外，发现声学输出功率和传输效率（〜50％）可与单片PZT换能器相媲美，证明了在宽带宽，高功率超声换能器应用中的潜力。
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