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In this study, TiO 2 /Al 2 (SO 4 ) 3  and ZrO 2  composite pigments were prepared with Al 2 (SO 4 ) 3  and ZrO 2  as coating agents. Firstly, Al 2 (SO 4 ) 3  was added into titanium dioxide pigment, and then ball-milled and dispersed to make the surface of pigment positively charged, and then combined with ZrO 2  in solution. Titanium dioxide pigment coated with Al 2 (SO 4 ) 3  and zirconium oxide was prepared by double titration. The reaction pH was adjusted by controlling the ammonia flow, and finally TiO 2 /Al 2 (SO 4 ) 3  and ZrO 2  composite pigment was obtained. The structure of modified pigment was analyzed by SEM and particle size distribution analysis. Furthermore, the effects of Al 2 (SO 4 ) 3  and ZrO 2  coating on the tinting strength, dispersibility and hiding power of titanium dioxide pigment in water were studied. The results show that scanning electron microscope and particle size analysis show that good Al 2 (SO 4 ) 3  and ZrO 2  coatings can be obtained by this experimental method. In the pigment performance test, the tinting power, hiding power and dispersibility of TiO 2 /Al 2 (SO 4 ) 3  and ZrO 2  composite pigment are better than those of uncoated titanium dioxide pigment.

Study on coated titanium dioxide pigment and its performance test