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In order to explore the microstructures and ferroelectric properties of the Ca-doped BaTiO 3  nanotubes, anodic oxidation method was used to generate TiO 2  nanotubes. As a template to TiO 2  nanotubes, hydrothermal synthesis method was used to prepare the Ca-doped BaTiO 3  nanotubes. The microstructures and ferroelectric properties of the Ca-doped BaTiO 3  nanotubes arrays, which had gained under different concentrations of calcium hydroxide, was measured and analyzed by scanning electron microscopy(SEM), X-ray diffraction instrument and ferroelectric analyzer respectively. The experiments show that with the increase of Ca(OH) 2  concentration, TiO 2  nanotubes can be transformed into Ba( 1-x )Ca x TiO 3  nanotubes, and the crystallinity is improved. The Ca(OH) 2  doping amount can improve the ferroelectric properties of Ba( 1-x )Ca x TiO 3 . When the Ca(OH) 2  doping amount is 12%, residual polarization strength of the Ba( 1-x )Ca x TiO 3  nanotubes is up to 1.32 µC/cm 2  and coercive field can reach 3.37 kV/cm.

Preparation and Ferroelectric Properties of Ca-doped BaTiO3 Nanotubes