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Ferroelectrics Volume 408, 2010 - Issue 1
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SECTION J: PIEZOELECTRICS AND APPLICATIONS

High Frequency PMN-PT 1-3 Composite Transducer for Ultrasonic Imaging Application

Ping Sun School of Physical Science and Technology, Wuhan University, Wuhan, China, 430072; NIH Resource on Medical Ultrasonic Transducer Technology, Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
,
Gaofeng Wang School of Physical Science and Technology, Wuhan University, Wuhan, China, 430072
,
Dawei Wu NIH Resource on Medical Ultrasonic Transducer Technology, Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
,
Benpeng Zhu NIH Resource on Medical Ultrasonic Transducer Technology, Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
,
Changhong Hu NIH Resource on Medical Ultrasonic Transducer Technology, Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
,
Changgeng Liu Geospace Research, Inc., El Segundo, CA, 90245, USA
,
Frank T. Djuth Geospace Research, Inc., El Segundo, CA, 90245, USA
,
Qifa Zhou NIH Resource on Medical Ultrasonic Transducer Technology, Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
&
K. Kirk Shung NIH Resource on Medical Ultrasonic Transducer Technology, Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
 show all
Pages 120-128 | Received 23 Aug 2009, Published online: 01 Dec 2010
 
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Abstract

Development of PMN-PT single crystal/epoxy 1-3 composites for high-frequency ultrasonic transducers application is presented. The composite was fabricated by using a DRIE dry etching process with a 45% volume fraction of PMN-PT. A 35 MHz ultrasound flat transducer was fabricated with the composite, which was found to have an effective electromechanical coupling coefficient of 0.81, an insertion loss of 18 db, and a −6 dB bandwidth as high as 100%. Tungsten wire phantom image shows that the transducer had an axial resolution of 30 μm, which was in good agreement with the theoretical expectation. The initial results showed that the PMN-PT/epoxy 1-3 composite has many attractive properties over conventional piezoelectric materials for medical imaging applications.

Acknowledgment

This work was partially supported by NIH Grants No. P41-EB2182, R44CA110214, China Scholar Council (CSC), and China National Outstanding Young Scientist Award No. 60788402. The authors would like to thank Mr. Jay Williams for his help with sample dicing.

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