Co掺杂对Bi_5Ti_3FeO_(15)陶瓷电学性能的影响
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摘要
用常规固相法制备了Co掺杂Bi5T3FeO15陶瓷,并用超声波进行表面处理。采用X射线衍射(XRD),压电常数以及电阻率测试等对其性能进行分析与表征。重点讨论了Co掺杂后,对比BTF电学性能和压电性能的变化。结果表明:Co掺杂后,样品中没有杂质出现,同时可以有效的增强压电系数,可以从纯的5p C/N提升至16pC/N。随着掺杂的增加,电阻率有所下降,后续进行了添加提升,表明该材料在高压无铅压电领域具有广阔的应用前景。
Aurivillius Bi5Ti3FeO15(BTF) multiferroic ceramics with different Co-modified concentrations have been synthesized by using the conventional solid state reaction method.X-ray diffraction,and resistance were employed to characterize the samples.The structures and electric properties of BTF were studied,and especially the effects of Co doping on the electrical and piezoelectric properties were addressed in detail.The results shows that Co-modified BTF ceramics exhibit better electrical and piezoelectric properties by comparison with the BTF.The optimal piezoelectric constant d33 of 16 pC/N is achieved for only 0.25 mol % Co substitution.With the increase of doping,the resistivity decreases,and subsequent improvements are made.All these results indicated that the Co-modified was an effective way to improve the properties of BTF ceramics and this composition also are promising for high pressure piezoelectric applications.
Aurivillius Bi5Ti3FeO15(BTF) multiferroic ceramics with different Co-modified concentrations have been synthesized by using the conventional solid state reaction method.X-ray diffraction,and resistance were employed to characterize the samples.The structures and electric properties of BTF were studied,and especially the effects of Co doping on the electrical and piezoelectric properties were addressed in detail.The results shows that Co-modified BTF ceramics exhibit better electrical and piezoelectric properties by comparison with the BTF.The optimal piezoelectric constant d33 of 16 pC/N is achieved for only 0.25 mol % Co substitution.With the increase of doping,the resistivity decreases,and subsequent improvements are made.All these results indicated that the Co-modified was an effective way to improve the properties of BTF ceramics and this composition also are promising for high pressure piezoelectric applications.
引文
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[5]Wang L,Liang R,Mao C,et al.Effect of PMN content on the phase structure and electrical properties of PMN-PZTceramics[J].Ceramics International,2013,39(7):8571-8574.
[6]Cross L E.Material science:Lead-free at last[J].Nature,2004,432:24-25.
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[8]Araujo A P D,Cuchiaro J D,Mcmillan L D,et al.Fatigue-free ferroelectric capacitors with platinum electrodes[J].Nature International Weekly Journal of Science,1995,374(6523):627-629.
[9]Zhang Z,Yan H,Dong X,et al.Preparation and electrical properties of bismuth layer-structured ceramic Bi3NbTiO9,solid solution[J].Materials Research Bulletin,2003,38(2):241-248
[10]Yan H,Zhang H,Ubic R,et al.A Lead-Free High-Curie-Point Ferroelectric Ceramic,CaBi2Nb2O9[J].Cheminform,2005,36(28):1261-1265.
[11]Chen C,Song K,Bai W,et al.Effect of Nb and more Fe ions co-doping on the microstructures,magnetic,and piezoelectric properties of Aurivillius Bi5Ti3FeO15 phases[J].Journal of Applied Physics,2016,120(21):214104.
[12]Long C,Chang Q,Fan H.Differences in nature of electrical conductions among Bi4Ti3O12-based ferroelectric polycrystalline ceramics[J].Scientific Reports,2017,7(1):4193.
[13]Wang Y P,Zhou L,Zhang M F,et al.Room-temperature saturated ferroelectric polarization in BiFeO3,ceramics synthesized by rapid liquid phase sintering[J].Applied Physics Letters,2004,84(10):1731-1733.
[14]Huang Z,Wang G,Li Y,et al.Electrical properties of(Na,Ce)doped Bi5Ti3FeO15 ceramics[J].Physica Status Solidi,2011,208(5):1047-1051.
[15]Wang Q,Liang Y,Wang C,et al.Enhanced dielectric and piezoelectric properties of Bi5Ti3FeO15 ceramics by manganese doping[C]//2015全国压电和声波理论及器件技术研讨会论文集.2015.
[16]Zhou Z,Dong X,Chen H,et al.Structural and Electrical Properties of W6+-Doped Bi3TiNbO9 High-Temperature Piezoceramics[J].Journal of the American Ceramic Society,2006,89(5):1756-1760.
[17]Newnham R E,Wolfe R W,Dorrian J F.Structural basis of ferroelectricity in the bismuth titanate family☆[J].Materials Research Bulletin,1971,6(10):1029-1039.
[18]杨帆,江向平,涂娜,et al.Ce掺杂对0.85Bi4Ti3O12-0.15LiNbO3铋层状压电陶瓷电性能的影响[J].硅酸盐学报,2015,43(9):1209-1213.Xin D,Peng Z,Huang F,et al.Effect of B-site dopants Nb,Ta and W on microstructure and electrical properties of Ca0.85(Li,Ce)0.075Bi4Ti4O15-0.01MnCO3 piezoelectric ceramics.J MaterSci:Mater Electron.2016;27:913-920.
[19]Huang J,Zheng H,Chen Z,Gao Q,Ma N,Du P.Percolative ceramic composites with giant dielectric constants and low dielectric losses.J Mater Chem.2009;19:3909-3913.
[20]Tian X,Qu S,Pei Z,Tian C,Xu Z.Piezoelectric properties of Ce-modified CaBi2Nb2O9 ceramics.Ferroelectrics.2010;404:127-133.