TITLE

Optimized orientation of 0.71Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 single crystal for applications in medical ultrasonic arrays

AUTHOR(S)
Dan Zhou; Jing Chen; Laihui Luo; Xiangyong Zhao; Haosu Luo
PUB. DATE
August 2008
SOURCE
Applied Physics Letters;8/18/2008, Vol. 93 Issue 7, p073502
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In order to extend the potential applications of medical ultrasonic array transducers, two optimized directions with the maximal electromechanical coefficient k33′ and minimal k31 are determined for [001] and [110] poled 0.71Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 single crystals using the experimental method. The maximum values of k33′ can reach 92.8% and 93.3%, respectively, corresponding to [001]W/[110]L and [110]W/[1–11]L cuts. Furthermore, we simulate the performances of three 3.5 MHz linear array transducers based on the determined directions by PIEZOCAD. Results indicate that under the [001]W/[110]L direction, 25% broader bandwidth, 40% shorter pulse length, and 3 dB higher sensitivity can be obtained compared to the traditional Pb(Zr1-xTix)O3 transducers.
ACCESSION #
34135609

 

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