Title :
Piezoelectric Single Crystals of Pb(Mg1/3Nb2/3)O3-PbTiO3 and their Applications in Medical Ultrasonic Transducers
Author :
Zhou, Dan ; Chen, Jing ; Luo, Haosu
Author_Institution :
Shanghai Inst. of Ceramics, Chinese Acad. of Sci., Shanghai
Abstract :
The (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) single crystals were investigated for various applications in medical ultrasonic transducers. PMN-PT monolithic transducer was fabricated with bandwidth at -3 dB enhanced by 34% and sensitivity enhanced by 4 dB, compared with traditional PZT transducer. The PMN-PT phased array transducer fabricated is also excellent. 1-3 piezoelectric composites using PMN-PT exhibit high thickness mode coupling factor (kt = 90.1%), and relatively low acoustic impedance (Z = 19.49 MRayls).The research work has been done indicates PMN-PT single crystal a promising application in medical ultrasonic transducers.
Keywords :
biomedical transducers; biomedical ultrasonics; crystal growth from melt; lead compounds; piezoelectric materials; piezoelectric transducers; Pb(Mg0.33Nb0.67)O3-PbTiO3; medical ultrasonic transducers; modified Bridgman technique; phased array transducer; piezoelectric single crystals; Acoustic arrays; Acoustic transducers; Bandwidth; Biomedical transducers; Crystals; Niobium; Phased arrays; Piezoelectric transducers; Ultrasonic transducer arrays; Ultrasonic transducers; 1-3 composite; PMN-PT single crystals; electromechanical coupling factor; medical ultrasonic transducer;
Conference_Titel :
BioMedical Engineering and Informatics, 2008. BMEI 2008. International Conference on
Conference_Location :
Sanya
Print_ISBN :
978-0-7695-3118-2
DOI :
10.1109/BMEI.2008.36
