Mg掺杂对BaTiO_3纳米管结构和电学性能的影响  

Effects of Mg-doping on the microstructure and electric properties of BaTiO_3 nanotubes

作　　者：蒋亚亚 邓湘云 贾艺璇 尹晓玲 董又铭 刘阳 黄希 

机构地区：[1]天津师范大学物理与材料科学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2018年第1期20-23,共4页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50872093)

摘　　要：为了探究Mg2+掺杂对BaTiO_3纳米管结构和性能的影响,以钛片为基底,采用阳极氧化法制备得到Ti O2纳米管,再通过水热法制备不同Mg2+掺杂浓度的BaTiO_3纳米管.利用XRD和SEM对不同掺杂浓度BaTiO_3纳米管的微观结构和表面形貌进行表征,采用TF Analyzer 2000和宽频介电阻抗谱仪对样品的铁电性能和介电性能进行测试.结果表明:当Mg2+掺杂浓度为0.012 mol/L时,BaTiO_3纳米管剩余极化强度Pr达到0.528 6μC/cm2,对应的矫顽场为16.08 k V/cm;当Mg2+掺杂浓度为0.01 mol/L时,室温下样品的介电常数达到1 200.In order to study the effect of Mg^2＋ doping on the structure and properties of BaTiO3 nanotubes, TiO2 nanotube were prepared by anodie oxidation method on the titanium substrate, and the BaTiO3 nanotubes doped with different con- centrations of Mg^2＋ were prepared by hydrothermal method. The microstructure and surface morphology of BaTiO3 nanotubes doped with different concentrations of Mg^2＋ were characterized by XRD and SEM, and the ferroelectric properties and dielectric properties of the samples were measured by TF Analyzer 2000 and broadband dielectric impedance spectrometer. The results show that remnant polarization Pr of BaTiO3 nanotubes reaches 0.528 6 ~C/cm2 and coercive field is 16.08 kV/em when the doping concentration of Mg^2＋ is 0.012 mol/L. Dielectric constant of the sample reaches 1 200 at room temperature when the doping concentration of Mg^2＋ is 0.01 mol/L.

关 键 词：水热法 BATIO3 纳米管 阳极氧化法 铁电性 介电性能 

分 类 号：O487[理学—固体物理] TB383.1[理学—物理]