中文摘要：

采用溶胶-凝胶结合模板的方法制备得到La掺杂BiFeO3（Bi0.94La0.06FeO3（BLF））多铁纳米管,运用X射线衍射仪、扫描电子显微镜（SEM）、透射电子显微镜（TEM和HRTEM）以及多功能铁电测试仪对样品进行了形貌表征和铁电性能测试。结果显示：纳米管的外壁光滑,排列有序,外径约为200nm;高分辨透射电子显微镜的测试结果证明BLF纳米管是多晶钙钛矿结构;在测试电压为2 000V时,BLF纳米管剩余极化值Pr达到36.6μC/cm2,矫顽电场Ec为129kV/cm;测试电场为±100kV/cm时,漏电流密度为分别为1.44×10-3和1.63×10-3A/cm2。

英文摘要：

La doped multiferroic BiFeO3（Bi0.94La0.06FeO3（BLF）） nanotubes was obtained by sol-gel method combining templates.The morphology characterization and ferroelectricity test of the samples were conducted by X-ray diffractometer,scanning electron microscope（SEM）,transmission electron microscope（TEM and HRTEM） and multi-functional ferroelectric tester.The results show that the nanotubes with a smooth tubewall arrange orderly,and the external diameter is about 200 nm.The high-resolution transmission electron microscope（HRTEM） test results show that BLF nanotubes are the polycrystal perovskite-type structure.The ferroelectric properties of the BLF are of a remnant polarization（Pr） of 36.6 μC/cm2 and a coercive electric field（Ec）of 129 kV/cm at a applied voltage of 2 000 V.The leakage current intensity of the BLF nanotubes is 1.44×10-3 A/cm2 and 1.63×10-3 A/cm2 at the applied electrical field of ±100 kV/cm,respectively.