Nano-size BaTiO3 powder was synthesized by relatively simple hydrothermal reaction method. Finely dispersed Ti hydroxide precursor was first precipitated using Ti(SO4)2 and NaOH solution by applying ultrasonic power and washed thoroughly to remove SO4 2- and Na+ ion. Then hydrothermal reaction was done at 160℃ for 6 hrs using solution prepared by washed Ti hydroxide precursor slurry and Ba(OH)2ㆍ8H2O with Ti:Ba mole ratio of 1:1. 200 ~ 500 nm size and uniform size distributed BaTiO3 powder was synthesized by relatively low temperature and simple process.
