A、B位空位比对PZT压电性能的影响
|
摘要
以La~(3+)和Nb~(5+)分别为A、B位不等价取代离子,研究了A、B位不等价离子掺杂引起的空位比对[(Pb_(0.93)La_(0.07))1-αα][(Zr1-y-zTiyNbz)1-ββ]O3(PLZTN)陶瓷性能的影响,并找出了A、B位同时掺杂取代时影响锆钛酸铅(PZT)陶瓷性能的关键因素。在该文的y、z、α、β取值范围内制备出的压电陶瓷均具有较纯净的钙钛矿结构,表现出弛豫铁电体特性。当摩尔比r(Ti)/r(Zr)=39/61,Nb在B位的摩尔分数z=0.02,空位比α/β=2/1时,陶瓷样品具有最佳的压电性能:压电应变常数d33=800pC/N,平面机电耦合系数kp=71.85%。该陶瓷样品具有较大的电致伸缩系数。以其制作的0.22mm×7.8mm×45mm压电片的横向机电耦合系数k31达0.46。该陶瓷片组装的双晶片在180V电压驱动下,其悬臂梁结构的自由端推力为32g,空载位移量为0.8mm。该材料是纺织经编机压电贾卡制造的较理想材料。
The La~(3+) and Nb~(5+) were used as the non-equivalent substitution of Aand Bions in PZT ceramics,the effects of A/Bvacancies ratio caused by the unequal ions doping of Aand Bsites on the performance of[(Pb_(0.93)La_(0.07))1-α□α][(Zr1-y-zTiyNbz)1-β□β]O3(PLZTN)ceramics were investigated.The key factors that affect the properties of PZT ceramics were found when the Aand Bsites were simultaneously doped and substituted.The piezoelectric ceramics prepared in the range of values of y、z、α、βhad a relatively pure perovskite structure and exhibited the characteristics of relaxation ferroelectrics.When r(Ti)/r(Zr)=39/61,z=0.02 and α/β=2/1,the PLZTN ceramics sample presented the optimal piezoelectric performance.The piezoelectric constant d33 and plane electromechanical coupling coefficient kp were found to be 800pC/N and 71.85%,respectively.The materials showed a large electrostrictive coefficient.The k31 of the piezoelectric thin bar(0.22 mm×7.8 mm×45 mm)was found to be0.46.The piezoelectric bimorphs were assembled by these ceramic thin bars,and the free end thrust of the cantilever beam was 32 grams and the unloaded displacement was 0.8mm under the voltage of 180 V.The ceramics might be ideal materials for the piezoelectric Jacquard applications of the warp knitting machine.
The La~(3+) and Nb~(5+) were used as the non-equivalent substitution of Aand Bions in PZT ceramics,the effects of A/Bvacancies ratio caused by the unequal ions doping of Aand Bsites on the performance of[(Pb_(0.93)La_(0.07))1-α□α][(Zr1-y-zTiyNbz)1-β□β]O3(PLZTN)ceramics were investigated.The key factors that affect the properties of PZT ceramics were found when the Aand Bsites were simultaneously doped and substituted.The piezoelectric ceramics prepared in the range of values of y、z、α、βhad a relatively pure perovskite structure and exhibited the characteristics of relaxation ferroelectrics.When r(Ti)/r(Zr)=39/61,z=0.02 and α/β=2/1,the PLZTN ceramics sample presented the optimal piezoelectric performance.The piezoelectric constant d33 and plane electromechanical coupling coefficient kp were found to be 800pC/N and 71.85%,respectively.The materials showed a large electrostrictive coefficient.The k31 of the piezoelectric thin bar(0.22 mm×7.8 mm×45 mm)was found to be0.46.The piezoelectric bimorphs were assembled by these ceramic thin bars,and the free end thrust of the cantilever beam was 32 grams and the unloaded displacement was 0.8mm under the voltage of 180 V.The ceramics might be ideal materials for the piezoelectric Jacquard applications of the warp knitting machine.
引文
[1]YOO S Y,HA J Y,YOON S J,et al.High-power properties of piezoelectric hard materials sintered at low temperature for multilayer ceramic actuators[J].JEur Ceram Soc,2013,33(10):1769-1778.
[2]HWANG W,PARK H C.Finite element modeling of piezoelectric sensors and actuators[J].AIAA J,1993,31(31):930-937.
[3]YANG M,CHEUNG P Y,TZANG C H,et al.Piezoelectric ceramic sensor and sensor array for detection of molecular makers:US20100088039[P].2010-04-08.
[4]ERHART P,TRSKELIN P,ALBE K.Formation and switching of defect dipoles in acceptor doped lead titanate:A kinetic model based on first-principles calculations[J].Physical Review B Condensed Matter,2013,88(2):3605-3611.
[5]FRAYGOLA B M,CHANDRASEKANAR A,BA-HATI D,et al.Piezoelectric softening by Nb substitution in(Ba,Pb)ZrO3ceramics[J].Journal of the American Ceramic Society,2017,100:1-11.
[6]KARAPUZHA A S,JAMES N K,KHANBAREHH,et al.Structure,dielectric and piezoelectric properties of donor doped PZT ceramics across the phase diagram[J].Ferroelectrics,2016,504(1):160-171.
[7]FRAYGOLA B,SALAZAR U,BIANCOLI A,et al.Effects of Nb doping in lead barium zirconate ceramics[C]//Prague,Czech Republic:Applications of Ferroelectric and Workshop on the Piezoresponse Force Microscopy,IEEE,2014:89-92.
[8]SUN E,CAO W.Relaxor-based ferroelectric single crystals:Growth,domain engineering,characterization and applications[J].Prog Mater Sci,2014,65:124-210.
[9]ZUO R,LIU Y,SU S,et al.Phase transformation behavior and electrical properties of Pb(Zr0.56Ti0.44)O3-Bi(Zn0.5Ti0.5)O3solid solution ceramics[J].J Am Ceram Soc,2011,94:4340-4344.
[10]ZHANG M H,WANG K,DU Y J,et al.High and temperature-insensitive piezoelectric strain in alkali niobate lead-free perovskite[J].J Am Chem Soc,2017,139(10):3889-3895.
[11]LIU X,CHEN Z,FANG B,et al.Enhancing piezoelectric properties of BCZT ceramics by Sr and Sn codoping[J].J Alloys Compd,2015,640:128-133.
[2]HWANG W,PARK H C.Finite element modeling of piezoelectric sensors and actuators[J].AIAA J,1993,31(31):930-937.
[3]YANG M,CHEUNG P Y,TZANG C H,et al.Piezoelectric ceramic sensor and sensor array for detection of molecular makers:US20100088039[P].2010-04-08.
[4]ERHART P,TRSKELIN P,ALBE K.Formation and switching of defect dipoles in acceptor doped lead titanate:A kinetic model based on first-principles calculations[J].Physical Review B Condensed Matter,2013,88(2):3605-3611.
[5]FRAYGOLA B M,CHANDRASEKANAR A,BA-HATI D,et al.Piezoelectric softening by Nb substitution in(Ba,Pb)ZrO3ceramics[J].Journal of the American Ceramic Society,2017,100:1-11.
[6]KARAPUZHA A S,JAMES N K,KHANBAREHH,et al.Structure,dielectric and piezoelectric properties of donor doped PZT ceramics across the phase diagram[J].Ferroelectrics,2016,504(1):160-171.
[7]FRAYGOLA B,SALAZAR U,BIANCOLI A,et al.Effects of Nb doping in lead barium zirconate ceramics[C]//Prague,Czech Republic:Applications of Ferroelectric and Workshop on the Piezoresponse Force Microscopy,IEEE,2014:89-92.
[8]SUN E,CAO W.Relaxor-based ferroelectric single crystals:Growth,domain engineering,characterization and applications[J].Prog Mater Sci,2014,65:124-210.
[9]ZUO R,LIU Y,SU S,et al.Phase transformation behavior and electrical properties of Pb(Zr0.56Ti0.44)O3-Bi(Zn0.5Ti0.5)O3solid solution ceramics[J].J Am Ceram Soc,2011,94:4340-4344.
[10]ZHANG M H,WANG K,DU Y J,et al.High and temperature-insensitive piezoelectric strain in alkali niobate lead-free perovskite[J].J Am Chem Soc,2017,139(10):3889-3895.
[11]LIU X,CHEN Z,FANG B,et al.Enhancing piezoelectric properties of BCZT ceramics by Sr and Sn codoping[J].J Alloys Compd,2015,640:128-133.