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.

Electrophoretic Deposition on Anodes from Aqueous Titania Suspensions with Titanate Solution

“…Enhancement of the dispersion and fluidity of sub-micron-sized particles is a key technique in EPD processes. We reported previously that titanate aqueous solution (TTIP-Lac) prepared by direct reaction of titanium tetraisopropoxide (TTIP) with lactic acid (Lac) in water showed characteristics of a polyanion and acted a dispersant for preparing alumina suspensions [4]. The titanate solutions are very valuable as starting materials for other titanium compounds, including titania, because they have higher titanium content and lower carbon dioxide emission on firing to titanium oxide.…”