HIGH CURIE TEMPERATURE PIEZOELECTRIC SINGLE CRYSTALS Pb(In1/2Nb1/2)O3Pb(Mg1/3Nb2/3)O3-PbTiO3 AND THEIR APPLICATIONS IN MEDICAL ULTRASONIC TRANSDUCERS

作     者：Wei Wang~(*1,2),Yaoyao Zhang~(1,2),Xiangyong Zhao~1,Haosu Luo~1 1 Key Laboratory of Inorganic Functional Material and Device,Shanghai Institute of Ceramics, Chinese Academy of Sciences,215 Chengbei Road,Jiading,Shanghai 201800,China 2 Graduate School of the Chinese Academy of Sciences,Beijing 100039,China 

会议名称：《2010全国压电和声波理论及器件技术研讨会》

会议日期：2010年

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the Ministry of Science and Technology of China through 863 Program (No.2008AA03Z410) 973 Program(No. 2009CB623305) the Natural Science Foundation of China(Nos.60837003,50777065 and 50602047) Shanghai Municipal Government(No.08JC1420500) the Innovation Fund of Shanghai Institute of Ceramics (Nos.O99ZC4140G and O99ZC1110G) the Fund of National Engineering Research Center for Optoelectronic Crystalline Materials(No. 2005DC105003-2007K05) 

关 键 词：relaxor ferroelectric single crystals PIN-PMN-PT PMN-PT ultrasonic transducer 

摘      要：High Cure temperature and larger coercive field ternary Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT or PIMNT) single crystals were grown,while maintain comparable piezoelectric properties with *** have designed and prototyped 1.6MHz ultrasonic transducers based on PIN-PMN-PT single crystals,which can be used in transcranial Doppler(TCD) *** with PZT-based TCD probe,the two-way insertion loss achieved by PIN-PMN-PT single crystals-based TCD probe is about 4 dB *** -6dB bandwidth of PIN-PMN-PT single crystal-based transducer is nearly 10%*** improvement of sensitivity and bandwidth of crystal-based probe reveal the great advantages in medical ultrasonic transducers ***,due to the enhanced beam-mode piezoelectric property of PIN-PMN-PT single crystals,the simulation results of ultrasonic phased array based on PIN-PMN-PT as well as PZT-5H ceramic reveal the significant *** 4dB larger sensitivity, 40%shorter impulse response and 20%broader bandwidth(-6dB) of PIN-PMN-PT single crystal-based will certainly improve medical imaging *** PIN-PMN-PT crystals with large size,ultrahigh piezoelectric properties,good thermal stability,and attractive simulation results may become the promising candidate for medical ultrasonic transducers applications.