摘要
用粉末-溶胶挤出法制备PZT压电纤维,以排列-浇铸法制备纤维体积分数为30%的1-3型压电复合材料。以热重-差热分析(TG-DSC)和扫描电子显微镜(SEM)研究了所得纤维的加热变化情况和表面形貌。测量计算压电陶瓷片与复合材料的压电常数、介电常数、机电耦合系数及机械品质因数。结果表明,纤维中的晶粒致密度越高,复合材料的压电与介电常数越高。复合材料的径向机电耦合系数(k_p)小于压电陶瓷片,厚度机电耦合系数(k_t)和k_t/k_p都大于陶瓷片。
PZT fibers were prepared by extruding a mixture of powder and sol. 1-3 piezoelectric composite which contains about 30 % ceramic phase was prepared by arranging PZT fibers and casting epoxy resin. The thermal transformation process and the surface morphology of the resulted fibers were studied by thermogravimetrie analysis （TG-DSC） and scanning electron micrograph （SEM）. Piezoelectric constant, dielectric constant, mechanical-electronical coupling coefficient and mechanical quality factor of piezoelectric ceramic piece and composite were measured and calculated. The results showed that the better of compactness of grain , the hinger of composite＇s piezoelectric constant and dielectric constant. The radial eleetromechanical coupling factor（kp） of the composite material was less than that of piezoelectric ceramic piece, but the thickness mechanical-electronical coupling coefficient（kt ） and kt/kp of the composite material were bigger than that of the piezoelectric ceramic piece.
出处
《压电与声光》
CSCD
北大核心
2010年第1期115-118,共4页
Piezoelectrics & Acoustooptics
基金
"八六三"计划基金资助项目(2009AA03Z107)
江苏省基础研究计划基金资助项目(BK2009718)
江苏省高技术项目基金资助项目(BG2006026)
关键词
溶胶-粉末挤出法
纤维制备
1-3型复合材料
性能研究
extrusion of a powder-sol mixture
the fabrication of fibers
1-3 piezoelectric composite
performace measurement
