【摘要】 为了研究Ba_1-xNd_2x/3TiO₃纳米管的铁电性能,以阳极氧化法制备所得Ti O2纳米管为模板,采用水热法在不同Nd（NO₃）₃浓度和不同水热温度下制备出掺钕BaTiO₃纳米管,并利用扫描电子显微镜（SEM）、X线衍射仪（XRD）和铁电分析仪对样品的表面形貌、微观结构和铁电性能进行分析.实验结果表明:较高的Nd（NO₃）₃掺杂浓度和水热反应温度均有利于TiO₂纳米管向Ba_1-xNd_2x/3TiO₃纳米管的转变,从而提高Ba_1-xNd_2x/3TiO₃纳米管的结晶度.Nd（NO3）3浓度为0.010 mol/L、水热温度为200℃条件下所得Ba_1-xNd_2x/3TiO₃纳米管的表面形貌最好,且其电滞回线具有良好的滞后性,表明样品具有优良的铁电性能,剩余极化强度Pr达到0.82μC/cm2,矫顽场Ec为2.390 k V/cm.更多还原

【Abstract】 In order to explore the ferroelectric properties of Ba_1-xNd_2x/3TiO₃ nanotubes,Ba_1-xNd_2x/3TiO₃ nanotubes were pre-pared by hydrothermal synthesis with different Nd（NO₃）₃ concentration or different hydrothermal reaction temperature using TiO₂ nanotubes as template which was prepared by anodic oxidation method. The morphology,microstructure and ferroelectric properties of Ba_1-xNd_2x/3TiO₃ nanotubes were analyzed by scanning electron microscopy,X-ray diffraction instrument and ferroelectric analyzer. The experimental results show that it is beneficial to the transition of TiO₂ nanotubes to Ba_1-xNd_2x/3TiO₃ nanotubes and improve the crystallinity to increase the concentration of Nd（NO₃）₃ and temperature of hydrothermal reaction.The surface morphology of Ba_1-xNd_2x/3TiO₃ nanotubes is the best when Nd（NO₃）₃ doping concentration is 0.01 mol/L and hydrothermal temperature is 200 ℃. P-E curve of Ba_1-xNd_2x/3TiO₃ nanotubes has good hysteresis, which indicates that the sam-ple has excellent ferroelectric properties,residual polarization strength Prof the Ba_1-xNd_2x/3TiO₃ is up to 0.82 μC/cm2 and coercive field Ecis 2.390 k V/cm.更多还原