Electrophoretic Deposition on Anodes from Aqueous Titania Suspensions with Titanate Solution
Titanate aqueous solution (TTIP-Lac) prepared by direct reaction of titanium tetraisopropoxide (TTIP) with lactic acid (Lac) in water shows characteristics of a polyanion and acts as a dispersant for preparing titanate suspension. Electrophoretic deposition (EPD) of aqueous titania suspensions was investigated with TTIP-Lac as a dispersant and hydroquinone (HQ) as an effective additive for bubble-free EPD of the aqueous system. The oxygen produced electrolytically by the EPD process at basic pH would be consumed by the chemical oxidation of HQ to quinone (Q). Bubble-free titania depositions were fabricated on anodes by EPD. A fired density with 99% theoretical density was obtained.
A. R. Boccaccini, O. van der Biest, R. Clasen, T. Uchikoshi
O. Sakurada et al., "Electrophoretic Deposition on Anodes from Aqueous Titania Suspensions with Titanate Solution", Key Engineering Materials, Vol. 412, pp. 313-316, 2009