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.
Original language | English |
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Article number | 5716465 |
Pages (from-to) | 477-484 |
Number of pages | 8 |
Journal | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control |
Volume | 58 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Feb 2011 |
Keywords
- Acoustics
- Couplings
- Crystals
- Frequency measurement
- Impedance
- Transducers
ASJC Scopus subject areas
- Instrumentation
- Acoustics and Ultrasonics
- Electrical and Electronic Engineering