PMN-PZT系陶瓷与MFC压电驱动器的制备及性能研究

发布时间：2018-08-01 11:37

【摘要】：本文采用传统固相法分别制备了xPb(Mg_(1/3)Nb_(2/3))O_3-(1-x)Pb(Zr_(0.45)Ti_(0.55))O_3(PMN-PZT)三元系铅基压电陶瓷和0.3Pb(Mg_(1/3)Nb_(2/3))O_3-0.7Pb(Zr_(0.45)Ti_(0.55))O_3+x wt%Fe_2O_3改性的PMN-PZT陶瓷,并通过改变陶瓷组分中PMN和Fe_2O_3的含量,分析其对陶瓷的相结构、微观形貌和电性能的影响,分别确定了两体系中PMN和Fe_2O_3的最佳含量。然后在此基础上选用综合性能最佳的0.3Pb(Mg_(1/3)Nb_(2/3))O_3-0.7Pb(Zr_(0.45)Ti_(0.55))O_3+0.6 wt%Fe_2O_3压电陶瓷作为原料,采用切割-填充法制备出MFC压电纤维复合材料驱动器。通过改变环氧树脂层的涂覆工艺和压电陶瓷纤维的宽度,研究了其对驱动器电性能的影响。首先,通过对xPb(Mg_(1/3)Nb_(2/3))O_3-(1-x)Pb(Zr_(0.45)Ti_(0.55))O_3(x=0.22,0.26,0.30,0.34)三元系压电陶瓷各项性能分析可知,0.3Pb(Mg_(1/3)Nb_(2/3))O_3-0.7Pb(Zr_(0.45)Ti_(0.55))O_3组分的陶瓷位于该体系的准同型相界附近,具有最佳的综合性能。其各项性能参数为:相对介电常数ε_r=1861,介电损耗tanδ=0.021,特征居里温度T_m=259 ~℃,压电常数d_(33)=518 p C/N,平面机电耦合系数k_p=0.59,机械品质因数Q_m=77,矫顽场E_c=10.41 k V/cm,剩余极化强度P_r=43.48μC/cm~2。其次,在性能最好的0.3Pb(Mg_(1/3)Nb_(2/3))O_3-0.7Pb(Zr_(0.45)Ti_(0.55))O_3三元系陶瓷的基础上掺入x wt%Fe_2O_3(x=0.2,0.4,0.6,0.8,1.0)。通过对烧结后陶瓷的各项性能分析可知,当Fe_2O_3含量为0.6wt%时,陶瓷的组分位于该体系的准同型相界附近,具有最佳的综合性能,其各项性能参数为:ε_r=2874,tanδ=0.015,T_m=263 ~℃,d_(33)=728 p C/N,k_p=0.69,Q_m=57,E_c=9.64 k V/cm,P_r=53.71μC/cm~2。最后,以0.3Pb(Mg_(1/3)Nb_(2/3))O_3-0.7Pb(Zr_(0.45)Ti_(0.55))O_3+0.6 wt%Fe_2O_3组分的压电陶瓷为原料,利用切割-填充法制备了MFC压电纤维复合材料驱动器。通过对驱动器的各项电性能分析可知,采用旋涂法涂覆得到的环氧树脂层更薄更均匀,最大厚度为15μm,从而使得驱动器的介电、压电和铁电性都得到提升。压电纤维宽度为0.5 mm的驱动器具有最佳的压电性能,各项性能参数为:ε_r=1007,tanδ=0.061,d_(33)=422 p C/N,k_(33)=0.41,E_c=4.59 k V/cm,P_r=26.10μC/cm~2。
[Abstract]:In this paper, the xPb (Mg_ (1/3) Nb_ (2/3)) O_3- (1-x) Pb (Zr_ (0.45) Ti_ (0.55)) O_3 (PMN-PZT) three element lead based piezoelectric ceramics and Nb_ (0.55) are modified respectively by the traditional solid phase method. The optimum content of PMN and Fe_2O_3 in the two system was determined by the phase structure, micromorphology and electrical properties, and on this basis, the composite 0.3Pb (Mg_ (1/3) Nb_ (2/3)) O_3-0.7Pb (Zr_ (0.45) Ti_ (0.55)) O_3+0.6 wt%Fe_2O_3 piezoelectric ceramic was selected as the raw material, and the piezoelectric fiber composite was prepared by the cutting and filling method. By changing the coating process of the epoxy resin layer and the width of the piezoelectric ceramic fiber, the influence on the electrical performance of the actuator was studied. First, the performance of the xPb (Mg_ (1/3) Nb_ (2/3)) O_3- (1-x) Pb (Zr_ (0.45) Ti_ (0.55)) O_3 (x=) three element piezoelectric ceramics was analyzed. The ceramics of 0.7Pb (Zr_ (0.45) Ti_ (0.55)) O_3 component are located near the quasi Homo phase boundary of the system, and have the best comprehensive properties. Their performance parameters are relative dielectric constant epsilon _r=1861, dielectric loss tan delta =0.021, characteristic Curie temperature T_m=259 ~ C, piezoelectric constant d_ (33) =518 P C/N, plane electromechanical coupling coefficient, mechanical quality factor Q_m=77, the coercive field E_c=10.41 K V/cm, and the residual polarization intensity P_r=43.48 micron, followed by the best performance 0.3Pb (Mg_ (1/3) Nb_ (2/3)) O_3-0.7Pb (0.45) (0.55). The composition of the ceramics is located near the quasi identical phase boundary of the system, and has the best comprehensive performance. Its performance parameters are: _r=2874, tan delta =0.015, T_m=263 ~ C, d_ (33) =728 P C/N, k_p=0.69, Q_m=57, E_c=9.64 K. MFC piezoelectric fiber composite actuator is prepared by cutting and filling method. Through the analysis of various electrical properties of the driver, it is known that the epoxy resin layer coated by spin coating is thinner and more uniform and the maximum thickness is 15 u m, thus the dielectric, piezoelectric and ferroelectric properties of the driver are improved. The driver with a width of 0.5 mm has the best piezoelectric performance. The performance parameters are: epsilon _r=1007, tan delta =0.061, d_ (33) =422 P C/N, k_ (33) =0.41, E_c=4.59 K.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ174.75;TM282

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