Abstract
TiO2 powders prepared by Chloride process under conventional conditions were found to consist of anatase-type particles and rutile-type particles. Conventional TiO2 powders are mixtures of these two different size-range groups of particles, common TiO2 powders has a substantial particle distribution. Two types of ultra fine TiO2 powders at a same level of particle size, namely anatase rich type (ratio of anatase to rutile > 90%) and rutile rich type (ratio of rutile to anatase > 90%), were synthesized by using fine tuned process control. Both powders were synthesized to have SSA of about 30 m2/g and an average particle sizes to be about 40 nm. The particle size distributions of both powders were found to be much less than conventional TiO2 powders of this size. These TiO2 powders were suitable for the solid state reaction of narrow particle distribution BaTiO3 ultra-fine powders for high quality MLCC.
