Abstract
Spherical TiO2 powders were prepared by Chloride process. These powders have Specific Surface Area (SSA) of about 15m2/g and average particle size of about 100nm. The results give the evidence of a strong effect of the quench-cooling by using the quench-cooling device for controlling a wide range of temperature in flame. These microstructures (single crystal, bi-crystal or poly-crystal) and crystal phases (anatase or rutile) were observed by TEM bright field images and electron diffraction patterns. This study suggested that these spherical TiO2 powders had potential for the solid state reaction to form spherical BaTiO3 ultra-fine powders for high quality MLCC.
