Novel Synthesis for Ultrafine Barium Titanate Powders Using Peptized Titania Nano-Sol
We have investigated a novel synthesis for highly spherical and ultrafine barium titanate (BaTiO3) powders using a peptized titania (TiO2) nano-sol as a precursor. The obtained TiO2 nano-sol had the size less than 10 nm, which could be easily converted to BaTiO3 under 100 °C. The size of the resulting BaTiO3 powder could be controlled from 42 to 167 nm by lowering the solution concentration from 1.00 M to 0.15 M. BET analysis indicated that the as-prepared BaTiO3 powders had some porosity which was increased with the particle size. It was also found that the as-prepared BaTiO3 with smaller size had higher tetragonality and less intra-granular pores after annealing.
J. J. Lee et al., "Novel Synthesis for Ultrafine Barium Titanate Powders Using Peptized Titania Nano-Sol", Advances in Science and Technology, Vol. 45, pp. 254-259, 2006