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Fabrication and performance of endoscopic ultrasound radial arrays based on PMN-PT single crystal/epoxy 1-3 composite.
- Source :
- IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control; 02/01/2011, Vol. 58 Issue 2, p477-484, 0p
- Publication Year :
- 2011
-
Abstract
- In this paper, 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) single crystal/epoxy 1/3 composite was used as the active material of the endoscopic ultrasonic radial array transducer, because this composite exhibited ultrahigh electromechanical coupling coefficient (kt = 0.81%), very low mechanical quality factor (Qm = 11) and relatively low acoustic impedance (Zt = 12 MRayls). A 6.91 MHz PMN-PT/epoxy 1/3 composite radial array transducer with 64 elements was tested in a pulseecho response measurement. The -6-dB bandwidth of the composite array transducer was 102%, which was ~30% larger than that of traditional lead zirconate titanate array transducer. The two-way insertion loss was found to be -32.3 dB. The obtained results show that this broadband array transducer is promising for acquiring high-resolution endoscopic ultrasonic images in many clinical applications. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 08853010
- Volume :
- 58
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control
- Publication Type :
- Academic Journal
- Accession number :
- 58578622
- Full Text :
- https://doi.org/10.1109/TUFFC.2011.1825