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|Title:||Single crystal PMN-0.33PT/epoxy 1-3 composites for ultrasonic transducer applications|
Chan, Helen L. W.
|Source:||IEEE transactions on ultrasonics, ferroelectrics, and frequency control, Sept. 2003, v. 50, no. 9, p.1177-1183|
|Abstract:||Lead magnesium niobate-lead titanate 0.67Pb (Mg[sub ⅓]Nb[sub ⅔])O₃-0.33PbTiO₃ (PMN-0.33PT, abbreviated as PMN-PT) single crystals were used to fabricate PMN-PT/epoxy 1-3 composites with different volume fractions of PMN-PT ranging from 0.4 to 0.8. The electromechanical properties of the 1-3 composites were determined by the resonance technique. Theoretical modeling of the 1-3 composites matched quite well with the measured material properties. It was demonstrated that the thickness electromechanical coupling coefficients of the composites could reach as high as 0.8. A 2.4 MHz plane ultrasonic transducer was fabricated using a PMN-PT/epoxy 1-3 composite with 0.37 volume fraction of PMN-PT. It shows a -6 dB bandwidth of ∼61% and an insertion loss of -14 dB.|
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|Appears in Collections:||AP Journal/Magazine Articles|
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