【摘要】：本文采用傳統(tǒng)固相法分別制備了xPb(Mg_(1/3)Nb_(2/3))O_3-(1-x)Pb(Zr_(0.45)Ti_(0.55))O_3(PMN-PZT)三元系鉛基壓電陶瓷和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,并通過改變陶瓷組分中PMN和Fe_2O_3的含量,分析其對(duì)陶瓷的相結(jié)構(gòu)、微觀形貌和電性能的影響,分別確定了兩體系中PMN和Fe_2O_3的最佳含量。然后在此基礎(chǔ)上選用綜合性能最佳的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壓電陶瓷作為原料,采用切割-填充法制備出MFC壓電纖維復(fù)合材料驅(qū)動(dòng)器。通過改變環(huán)氧樹脂層的涂覆工藝和壓電陶瓷纖維的寬度,研究了其對(duì)驅(qū)動(dòng)器電性能的影響。首先,通過對(duì)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)三元系壓電陶瓷各項(xiàng)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組分的陶瓷位于該體系的準(zhǔn)同型相界附近,具有最佳的綜合性能。其各項(xiàng)性能參數(shù)為:相對(duì)介電常數(shù)ε_(tái)r=1861,介電損耗tanδ=0.021,特征居里溫度T_m=259 ~℃,壓電常數(shù)d_(33)=518 p C/N,平面機(jī)電耦合系數(shù)k_p=0.59,機(jī)械品質(zhì)因數(shù)Q_m=77,矯頑場(chǎng)E_c=10.41 k V/cm,剩余極化強(qiáng)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_3三元系陶瓷的基礎(chǔ)上摻入x wt%Fe_2O_3(x=0.2,0.4,0.6,0.8,1.0)。通過對(duì)燒結(jié)后陶瓷的各項(xiàng)性能分析可知,當(dāng)Fe_2O_3含量為0.6wt%時(shí),陶瓷的組分位于該體系的準(zhǔn)同型相界附近,具有最佳的綜合性能,其各項(xiàng)性能參數(shù)為:ε_(tái)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組分的壓電陶瓷為原料,利用切割-填充法制備了MFC壓電纖維復(fù)合材料驅(qū)動(dòng)器。通過對(duì)驅(qū)動(dòng)器的各項(xiàng)電性能分析可知,采用旋涂法涂覆得到的環(huán)氧樹脂層更薄更均勻,最大厚度為15μm,從而使得驅(qū)動(dòng)器的介電、壓電和鐵電性都得到提升。壓電纖維寬度為0.5 mm的驅(qū)動(dòng)器具有最佳的壓電性能,各項(xiàng)性能參數(shù)為:ε_(tái)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.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ174.75;TM282

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