Preparation of Rutile Titanium Dioxide White Pigment via Doping and Calcination of Metatitanic Acid Obtained by the NaOH Molten Salt Method

Rutile titanium dioxide (TiO 2 ) white pigment has been prepared by doping and calcination of metatitanic acid (H 2 TiO 3 ) obtained by the NaOH molten salt method. It was found that the properties of the rutile TiO 2 sample prepared were improved by adding K 2 O, P 2 O 5, Al 2 O 3, and rutile nuclei. The X-ray diffraction (XRD) results show the rutile content of the rutile TiO 2 sample prepared is 97%, and scanning electron microscopy (SEM) results show that the rutile TiO 2 particles prepared have well-shaped morphology and narrow particle size distribution. The purity and color performance of the rutile TiO 2 sample prepared approached the commercial TiO 2 pigment standards.