Abstract: The effects of additives [N(CH₂CH₂OH)₃,(NaPO₃)_n(n=10～20), (NH₄)₂CO₃] on rheological properties of TiO₂/water dispersions were studied through measurements of shear viscosity, yield stress and thixotropic loops. The results show that TiO₂water dispersions exhibit the best disperse property, low viscosity without yield stress when the mass fraction of N(CH₂CH₂OH)₃ is 0.1%; but (NaPO₃)_n(n=10～20) beheves the time dependence as dispersant for TiO₂water dispersions, as flocculation agent in TiO₂industry, the concentration of (NH₄)₂CO₃has effects on the rheological properties of TiO₂water dispersions.

Key words: TiO₂/water dispersions, Dispersant, Flocculation agent, Rheological properties