Abstract: Sol-gel procedure is an important method on the fabrication of nanocrystalline powders. In present paper, we studied the influences
of some parameters, including the type of solvent, amount of water addition, ageing time and calcination temperature on the properties of BaTiO₃ powder.
It was found that the solvent type affected the gel point, the different amount of water addition could alter the structure of condensation polymer,
the varying of ageing time influenced the growth of grains and the calcination temperature had great effect on phase structure and grain size. Studying
the physical and chemical changes during the reactions, we obtained nanocrystalline BaTiO₃ powders with fine grain size, low aggregates and fine grain distribution.

Key words: sol-gel method, nanocrystalline materials, influential parameters