| 3 | NOVEL LEAD ZIRCONATE TITANATE COMPOSITE VIA FREEZING TECHNOLOGY FOR HIGH FREQUENCY TRANSDUCER APPLICATIONS显示文摘Novel PZT-5A ceramic-polymer composite was prepared via freezing technology.This composite exhibited good dielectric and ferroelectric behaviors.At 1 kHz,the dielectric constant and the dielectric loss were 546 and 0.046,respectively,while the remnant polarization was 13.0μC=cm^(2)at room temperature.The electromechanical coupling coe±cient ekt T of PZT-5A composite was measured to be 0.54,which is similar to that of PZT piezoelectric ceramic.The piezoelectric coefficient(d_(33))of PZT-5A composite was determined to be~250 pC=N.Using this composite,a 58MHz single element transducer with the bandwidth of 70%at-6dB was built,and the insertion loss was tested to be-29dB around the central frequency. | B.P.ZHU Q.F.ZHOU C.H.HU K.K.SHUNG E.P.GORZKOWSKI M.J.PAN | 2011 | Journal of Advanced Dielectrics2011，1，1： | 0 |
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