Preparation of White Pigments from Nanosized Alkaline Earth Metal Titanates and Potassium Titanium Oxophosphate

摘要

The aim of this work is to produce white pigments having less amount of Ti~(4+) than that of pure TiO_(2-) It develops synthetic methods for the preparation of nanosized white pigments based on alkaline earth metal titanates and potassium titanium oxophosphate with a high surface area (30-80 m~2/g) from ilmenite. The preparative methods involve the extraction of titanium as a water-soluble titanium oxychloride from ilmenite and coprecipitation of constituent ions of pigments from their aqueous mixture solutions using a suitable precipitant. All the synthesized pigments have been characterized by X-ray powder diffraction, transmission electron micrscope, and ultraviolet-visible spectroscopy study, energy-dispersive X-ray analysis, and Brunauer-Emmett-Teller surface area measurement.