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宽带0.72Pb(Mg(1/3)Nb(2/3))O(3)-0.28PbTiO(3)单晶相控阵换能器的多重匹配方案

Multiple matching scheme for broadband 0.72Pb(Mg(13)Nb(23))O(3)-0.28PbTiO(3) single crystal phased-array transducer.

作者信息

Lau S T, Li H, Wong K S, Zhou Q F, Zhou D, Li Y C, Luo H S, Shung K K, Dai J Y

出版信息

J Appl Phys. 2009 May 1;105(9):94908. doi: 10.1063/1.3065476. Epub 2009 May 11.

DOI:10.1063/1.3065476
PMID:19657405
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2719468/
Abstract

Lead magnesium niobate-lead titanate single crystal 0.72Pb(Mg(13)Nb(23))O(3)-0.28PbTiO(3) (abbreviated as PMN-PT) was used to fabricate high performance ultrasonic phased-array transducer as it exhibited excellent piezoelectric properties. In this paper, we focus on the design and fabrication of a low-loss and wide-band transducer for medical imaging applications. A KLM model based simulation software PiezoCAD was used for acoustic design of the transducer including the front-face matching and backing. The calculated results show that the -6 dB transducer bandwidth can be improved significantly by using double lambda8 matching layers and hard backing. A 4.0 MHz PMN-PT transducer array (with 16 elements) was fabricated and tested in a pulse-echo arrangement. A -6 dB bandwidth of 110% and two-way insertion loss of -46.5 dB were achieved.

摘要

铌镁酸铅-钛酸铅单晶0.72Pb(Mg(1/3)Nb(2/3))O(3)-0.28PbTiO(3)（简称为PMN-PT）因其优异的压电性能而被用于制造高性能超声相控阵换能器。在本文中，我们专注于用于医学成像应用的低损耗宽带换能器的设计与制造。基于KLM模型的仿真软件PiezoCAD用于换能器的声学设计，包括正面匹配和背衬。计算结果表明，通过使用双λ/8匹配层和硬背衬，-6 dB换能器带宽可得到显著改善。制作了一个4.0 MHz的PMN-PT换能器阵列（16个阵元）并在脉冲回波配置下进行测试。实现了110%的-6 dB带宽和-46.5 dB的双向插入损耗。

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