Abstract
The dispersion behavior of Li1.075Nb0.625Ti0.45O3 (LNT) powders in aqueous media was studied in this paper. The effect of pH, concentration of ammonium polyacrylate (PAA-NH4) dispersant and solids loading on the dispersion of LNT powders was reported. Optimum dispersing conditions were investigated in terms of zeta potential, sedimentation, mean particle size (d50), and rheology measurements. After adsorption of 0.6 wt% PAA-NH4, the absolute zeta potential reached the maximum value of 90 mV. The computed specific interaction energy (-ΔG0SP=8.6 kcal/mol) between particles and dispersant, indicated strong adsorption of PAA-NH4 on the LNT powder surface. Good agreement between zeta potential, mean particle size, sedimentation, and rheological test was found.
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