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以阳极氧化法制备的TiO2纳米管阵列为模板,结合水热法制备了钛酸钡纳米管阵列薄膜。研究了水热反应温度、反应时间对BaTiO3纳米管阵列薄膜表观形貌及电学性能的影响。样品经X射线衍射仪表征其晶体结构;扫描电子显微镜观察其微观形貌;以及使用宽频介电阻抗谱仪测试了样品的介电性能。结果表明,在较低的水热温度下即可制得单一立方相的BaTiO3纳米管阵列薄膜,纳米管壁厚约30 nm,薄膜厚度可达10μm;水热反应温度的升高和反应时间的延长有助于样品的结晶度完善和介电性能的提高;未经热处理的薄膜样品在1 KHz介电常数可达200。
TiO2 nanotube array prepared by anodic oxidation was used as a template to prepare a barium titanate nanotube array film by hydrothermal method. The effects of hydrothermal reaction temperature and reaction time on the morphology and electrical properties of BaTiO3 nanotube films were investigated. The crystal structure of the sample was characterized by X-ray diffractometer. The microstructure of the sample was observed by scanning electron microscopy. The dielectric properties of the sample were measured by broadband dielectric impedance spectroscopy. The results show that BaTiO3 nanotube array thin film with single cubic phase can be obtained at a low hydrothermal temperature. The wall thickness of the nanotube is about 30 nm and the thickness of the film is up to 10 μm. The increase of hydrothermal reaction temperature and reaction time Prolongation helps to improve the crystallinity of the sample and improve the dielectric properties; the film samples without heat treatment up to 200 at 1 KHz dielectric constant.