Dispersion and Fluidity of Aqueous Aluminum Oxide Suspension with Titanate Aqueous Solution

Abstract

Titanate aqueous solution (TIP-Lac) prepared by direct reaction of titanium tetraisopropoxide (TIP) with lactic acid (Lac) in water shows characteristics of a polyanion and acts as a dispersant for preparing aluminum oxide suspension. When small amounts of TIP-Lac were added to aqueous dispersions of alumina, which had a positive surface charge at pH 4, agglomeration of alumina occurred, and alumina was redispersed by further addition of TIP-Lac. The fluidity and dispersion of alumina were studied from the zeta potential, sedimentation velocity, and rheological measurements.