کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11263345 | 1701263 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Design and comparison of PMN-PT single crystals and PZT ceramics based medical phased array ultrasonic transducer
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The design, fabrication and comparison of PMN-PT single crystals and PZT ceramics based 3âMHz phased array ultrasonic transducers were investigated. The resonance mode and electromechanical properties for PMN-PT single crystal were simulated by using the COMSOL Multiphysics software. Simulation results indicate that the electromechanical coupling coefficient k33' keeps at 0.86-0.87 when the aspect ratio Gâ<â0.7, as well as a pure height-extensional mode was obtained. Two types of ultrasonic phased arrays using PMN-PT single crystal and PZT ceramic were fabricated and compared. The experimental results revealed that more than 27.7% broader -6âdB bandwidth, 5.2âdB higher relative sensitivity, and shorter pulse length can be obtained by using PMN-PT single crystal compared to the PZT array. The experimental results agreed well with the predictions of simulation by using the PiezoCAD software. Furthermore, PMN-PT array has the same good consistency of the performance as the PZT array, while the better acoustic performance and higher electromechanical properties compared to PZT array as a whole. In the end, the ultrasonic imaging which uses the PMN-PT based array transducer has the better definition, the higher axial resolution and lateral resolution compared to those of PZT based array transducer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 283, 1 November 2018, Pages 273-281
Journal: Sensors and Actuators A: Physical - Volume 283, 1 November 2018, Pages 273-281
نویسندگان
Zhang Zhang, Jialin Xu, Lili Yang, Sixing Liu, Junjie Xiao, Xiaobing Li, Xi'an Wang, Haosu Luo,