期刊
FERROELECTRICS
卷 408, 期 -, 页码 120-128出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00150193.2010.485546
关键词
PMN-PT; 1-3 composite; Ultrasonic transducer
资金
- NCI NIH HHS [R44 CA110214] Funding Source: Medline
- NIBIB NIH HHS [P41 EB002182, P41 EB002182-14] Funding Source: Medline
- NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING [P41EB002182] Funding Source: NIH RePORTER
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 mu m, 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.
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