Zr/Ti比及Sr掺杂对PNN-PSN-PMN-PZT压电陶瓷性能的影响
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摘要
采用固相烧结法制备了五元系PNN-PSN-PMN-PZT压电陶瓷,通过X线衍射(XRD)研究了组分不同Zr/Ti比的相结构,并研究不同Zr/Ti比和Sr掺杂量对组分介电、压电性能的影响。研究表明,组分的相结构均为单一的钙钛矿结构;随着Zr/Ti比的增加,组分的相结构由三方相向四方相转变,且组分的准同型相界位于r(Zr)/r(Ti)=0.98附近;在r(Zr)/r(Ti)=0.98的组分中掺杂Sr发现,随着Sr含量的逐渐增加,压电陶瓷的介电和压电性能先增加后减小,当x(Sr)=4.0%时,介电和压电性能出现极大值,即介电常数ε~T_(33)/ε_0=3 578,压电常数d_(33)=652pC/N,机电耦合系数k_p=0.81,品质因数Q_m=65,介电损耗tanδ=1.72%,居里温度T_C=191℃,且具有典型的介电弛豫特性。
The quirnary PNN-PSN-PMN-PZT piezoelectric ceramics were synthesized by the traditional solidstate process.The phase structures of these ceramics with different Zr/Ti ratio were characterized by XRD.And the effect of Zr/Ti ratio and Sr doping on the dielectric and piezoelectric properties of PNN-PSN-PMN-PZT ceramics were investigated in detail.The results indicated that the phase structure of the components was a single perovskite structure.The structure gradually transformed from the rhombohedral phase to the tetragonal phase with the Zr/Ti ratio increasing and the morphotropic phase boundary(MPB)was located at around 0.98of Zr/Ti ratio.With the content of Sr increasing,the dielectric and piezoelectric properties of MPB compostions with Zr/Ti ratio of 0.98increased firstly and then decreased.The specimen with 4.0%mol of Sr doping showed thetypical dielectric relaxation characteristic,andthe optimal dielectric and piezoelectric properties with the dielectric constantε~T_(33)/ε_0of 3 578,the piezoelectric constant d_(33)of 652pC/N,the electromechanical coupling factor k_pof 0.81,the mechanical quality factor Q_mof 65,the loss tangent tanδof 1.72%,the Curie temperature T_Cof 191℃.
The quirnary PNN-PSN-PMN-PZT piezoelectric ceramics were synthesized by the traditional solidstate process.The phase structures of these ceramics with different Zr/Ti ratio were characterized by XRD.And the effect of Zr/Ti ratio and Sr doping on the dielectric and piezoelectric properties of PNN-PSN-PMN-PZT ceramics were investigated in detail.The results indicated that the phase structure of the components was a single perovskite structure.The structure gradually transformed from the rhombohedral phase to the tetragonal phase with the Zr/Ti ratio increasing and the morphotropic phase boundary(MPB)was located at around 0.98of Zr/Ti ratio.With the content of Sr increasing,the dielectric and piezoelectric properties of MPB compostions with Zr/Ti ratio of 0.98increased firstly and then decreased.The specimen with 4.0%mol of Sr doping showed thetypical dielectric relaxation characteristic,andthe optimal dielectric and piezoelectric properties with the dielectric constantε~T_(33)/ε_0of 3 578,the piezoelectric constant d_(33)of 652pC/N,the electromechanical coupling factor k_pof 0.81,the mechanical quality factor Q_mof 65,the loss tangent tanδof 1.72%,the Curie temperature T_Cof 191℃.
引文
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[3]刘培祥.PMN-PNN-PZT体系压电陶瓷的性能和掺杂改性研究[D].天津:天津大学,2007.
[4]彭贵贵,郑徳一,胡顺敏.不同纯度Ni2O3对PNN-PZT压电陶瓷制备的影响[J].压电与声光,2016,38(4):663-666.PENG Guigui,ZHENG Deyi,HU Shunmin.The influence of Ni2O3 with different purity on the preparation of PNN-PZT piezoelectric ceramics material[J].Piezoelectrics&Acoustooptics,2016,38(4):663-666.
[5]CHAO Xiaolian,YANG Zupei,DONG Mingyuan,et al.Fabrication,characteristics and temperature stability of Pb(Mg1/3Nb2/3)O3-Pb(Sb1/3Nb2/3)O3-Pb(Ni1/3Nb2/3)O3-Pb(Zr,Ti)O3 piezoelectric actuators[J].Sensors and Actuators A,2009,151:71-76.
[6]BAMIERE F,BENKERT K,RADANIELINA M,et al.Low temperature sintering and high piezoelectric properties of strontium doped PNZT-PNN ceramics processed via the columbite route[J].Journal of the European Ceramic Society,2007,27:3613-3617.
[7]KAHOUL F,HAMZIOUI L,BOUTARFAIA A.Microstructural,dielectric,and piezoelectric properties of SFN-modified PZT ceramics[J].Energy Procedia,2015,74:184-190.
[8]DU Jianzhou,QIU Jinhao,ZHU Kongjun,et al.Microstructure,temperature stability and electrical properties of ZnO-modified Pb(Ni1/3Nb2/3)O3-Pb(Fe1/2Nb1/2)O3-Pb(Zr0.3Ti0.7)O3 piezoelectric ceramics[J].Ceramics International,2013,39:9385-9390.
[9]孙琳,孙清池,胜鹏.五元系PZN-PSN-PMS-PZT压电陶瓷的研究[J].压电与声光,2004,26(1):35-38.SUN Lin,SUN Qingchi,SHENG Peng.Study on PZN-PSN-PMS-PZT system piezoelectric ceramics[J].Piezoelectrics&Acoustooptics,2004,26(1):35-38.
[10]HOSONO Y,YAMASHITA Y.Piezoelectricceramics with high dielectric constants for ultrasonic medical transducers[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2005,10:1823-1828.
[11]山东大学压电铁电物理教研室.压电陶瓷及其应用[M].济南:山东人民出版社,1974:60-63.