SYNTHESIS, ACID AND BASE RESISTANCE OF NICKEL - CERIUM (+III) PHOSPHATE PIGMENTS

Abstract

Transition metal phosphates are used as inorganic pigments, however these materials had a weak point for acid and base resistance. Because cerium phosphate is insoluble in acidic and basic solution, the addition of cerium was tried to improve the acid and base resistance of nickel phosphate pigment. The cerium doped nickel phosphates were prepared from phosphoric acid, nickel nitrate, and cerium nitrate solution. The additional effects of cerium cation were studied on the chemical composition, particle shape and size distribution, specific surface area, color, acid and base resistance of the precipitates and their thermal products.