【作者】 林秀娟； 张斗； 张晓泳； 李志友； 周科朝；

【Author】 LIN Xiu-juan,ZHANG Dou,ZHANG Xiao-yong,LI Zhi-you,Zhou Ke-chao (State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

【机构】 中南大学粉末冶金国家重点实验室；

【摘要】 近年来锆钛酸铅（Pb（Zr,Ti）O₃,PZT）纤维被广泛应用于制备压电复合材料,典型应用之一是PZT纤维与聚合物基体构成的1-3型压电复合材料,在高分辨率超声传感器方面有着很好的应用前景。采用粘稠塑性法制备精细PZT压电纤维,采用SEM表征其表面形貌和微观结构,用XRD检测其四方相含量,使用拉伸实验测试其力学性能。并采用排列-浇铸法制备了1-3型压电复合材料,通过阻抗分析仪获得1-3压电复合材料的介电性能。结果表明,采用粘稠塑性法制备的精细PZT纤维直径均匀,表面光滑,孔隙率低,四方相含量较高;采用此纤维可以制备机电性能优良的1-3型压电复合材料。更多还原

【Abstract】 Recently Pb(Zr,Ti)O3(PZT) fibers have been widely employed in the piezoelectric composites.1-3 piezoelectric composites which consist of PZT fibers and polymer matrix are of a typical example and show profound prospects in the high-resolution ultrasonic transducer applications.In this paper,viscous polymer processed (VPP) fibers have been characterized in terms of morphology,microstructure,phase composition and mechanical properties by using SEM,XRD,tensile test,respectively.1-3 piezoelectric composites were prepared by arranging-and-filling method.The electromechanical coupling factor and the dielectric properties of the composites were characterized using an impedance analyzer.The results exhibit VPP fibers have high uniformity, smooth surface,low porosity and high percentage of the tetragonal phase.The results also exhibit 1-3 piezoelectric composites made from such PZT fibers show high electromechanical properties.更多还原