用于高功率应用的1-3型压电复合材料换能器的电声响应

Electroacoustic response of 1-3 piezocomposite transducers for high power applications.

作者信息

Jae Lee Hyeong, Zhang Shujun, Geng Xuecang, Shrout Thomas R

机构信息

Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA.

出版信息

Appl Phys Lett. 2012 Dec 17;101(25):253504. doi: 10.1063/1.4772482. Epub 2012 Dec 18.

DOI:10.1063/1.4772482

PMID:23319828

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3537705/

Abstract

The electroacoustic performance of 1-3 piezoelectric composite transducers with low loss polymer filler was studied and compared to monolithic Pb(Zr,Ti)O(3) (PZT) piezoelectric transducers. The 1-3 composite transducers exhibited significantly high electromechanical coupling factor (k(t) ∼ 0.64) when compared to monolithic counterparts (k(t) ∼ 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.

摘要

研究了具有低损耗聚合物填料的1-3型压电复合换能器的电声性能，并与整块式锆钛酸铅（PZT）压电换能器进行了比较。与整块式同类产品（k(t) ∼ 0.5）相比，1-3型复合换能器表现出显著更高的机电耦合系数（k(t) ∼ 0.64），从而使带宽和环路灵敏度得到改善，分别约为67%和-24.0 dB，而整块式同类产品分别为44%和-24.8 dB。此外，发现声输出功率和发射效率（约50%）与整块式PZT换能器相当，这表明其在宽带宽、高功率超声换能器应用方面具有潜力。

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