LAUSR

Abstract The highly dispersed NiTiO 3 @TiO 2 yellow pigments with core-shell structure were prepared through calcinations of precursors obtained from the precipitation of Ni 2+ on the surface of TiO 2 particles. The synthesized pigments were characterized by XRD, SEM, TEM, Uv–vis spectroscopy and colorimetry. The pigments were found to consist of TiO 2 core and outer ilmenite NiTiO 3 shell. The optical absorption of Ni 2+ in octahedral coordination produced intense yellow colors. Compared with pure NiTiO 3 , the NiTiO 3 @TiO 2 pigments presented higher yellow and lower red hues, resulted in intense yellow colors. The particle size distribution of the prepared pigments and ζ potential measurement indicated that the NiTiO 3 -0.75@TiO 2 pigments were uniform and well-dispersed in glycol solvents, and they form relatively more stable suspension than pure NiTiO 3 pigments. Meanwhile, these pigments were stable in commercial low–temperature ceramic glazes, possessed more brilliant yellowish colors than pure NiTiO 3 prepared by sol-gel method.