Titanium dioxide (TiO2) is used as a white pigment for architecture, cosmetic, and paint because it efficiently scatters visible light, there by imparting whiteness, brightness and opacity. This work describes a means of improving the whiteness and reflectivity of ceramic coated TiO2 pigment. A great deal of effort has been devoted to improving efficiency of withe pigments such as using chlorine method, modifying rutile TiO2 and post-treatment with a TiCl4 precursor. To retain and enhance the physical properties of white pigment, we adopted core-shell system with the silica (SiO2), aluminum oxide (Al2O3) and zirconium dioxide (ZrO2) as shell materials. Especially, various shell approaches have been developed for light harvesting in white pigments with introducing light-scattering materials and chalk resistance. Control of the shell thickness and whiteness of the TiO2 pigment was important factor for high quality outdoor white pigments and their shell thickness was achieved by regulating the reaction time, concentration and shell materials.

Tunable whiteness coloration behavior on rutile TiO2 ceramic pigment

253rd National Meeting (2017)

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