CAJ | 학술논문

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.
용분말-용효제출법제비PZT압전섬유,이배렬-요주법제비섬유체적분수위30%적1-3형압전복합재료.이열중-차열분석(TG-DSC)화소묘전자현미경(SEM)연구료소득섬유적가열변화정황화표면형모.측량계산압전도자편여복합재료적압전상수、개전상수、궤전우합계수급궤계품질인수.결과표명,섬유중적정립치밀도월고,복합재료적압전여개전상수월고.복합재료적경향궤전우합계수(k_p)소우압전도자편,후도궤전우합계수(k_t)화k_t/k_p도대우도자편.
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 thermogravimetric 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 electromechanical coupling factor(k_p) of the composite material was less than that of piezoelectric ceramic piece, but the thickness mechanical-electronical coupling coefficient(k_t) and k_t/k_p of the composite material were bigger than that of the piezoelectric ceramic piece.