Abstract: 2vol% nano-ZrO₂ aqueous suspensions were obtained by different colloidal stabilization mech-anism including single-electrostatic, steric (by PEG) and electrosteric (by PMAA-NH₄). These suspensions were studied by means of Zeta potential measurements. Sedimentation experiments viscosity measurements and particle-size analysis etc. At last, we obstained that the highly dis-persed and stabilized nano-ZrO₂ aqueous suspensions in acid condition and in alkaline condition.

Key words: zirconia aqueous suspension, electrostatic stabilization, steric stabilization, electrosteric stabilization