Study on electrophoretic deposition of BaTiO₃ film on stainless steel surface

The deposition of BaTiO₃ film on stainless steel was studied by using electrophoretic deposition. The effects on processes of electrophoretic deposition BaTiO₃ film were discussed. Field emission scanning electron microscope (FE-SEM), zeta potential measurement and optical microscope(OM), scanning electron microscope (SEM) was employed to observe the size of BaTiO₃ particles and micro-morphology of BaTiO₃ film before and after heat treatment, respectively. The preparation procedure was optimized by using micro-morphology evaluation and deposition weight method. It was showed that the size of the particles was mainly about between 100-400nm and intensely at about 200nm. It was indicated that BaTiO₃ film was more homogeneous and compacter after the heat treatment at 1150°C for 2h. The dielectric constant of BaTiO₃ film at 1150°C heat treatment was 5491 and 65 at the frequency of 100Hz and 100kHz in home temperature, respectively.