Mechanochemical Synthesis of Bi_4Ti_3O_(12)

摘要

Our efforts were directed to the preparation of bismuth titanate - Bi_4Ti_3O_(12) (BIT) by mechanically assisted synthesis. The mechanical activation was applied to prepare bismuth titanate, Bi_4Ti_3O_(12), from bismuth oxide, Bi_2O_3, and titanium oxide, TiO_2 (in an anatase crystal form). Mechanochemical synthesis was performed in a planetary ball mill in air atmosphere. Bismuth titanate ceramics was obtained by sintering at 1000℃. The formation of Bi_4Ti_3O_(12) in the sintered samples was confirmed by X-ray diffraction analysis. Scanning electron microscopy, SEM, was used to study the particle size and powder morphology. The obtained results indicate that Bi_4Ti_3O_(12) from the powder synthesized by high-energy ball milling exhibits good sinterability, showing advantage of the mechanochemical process over conventional solid-state reaction.