Relation between Dispersion Stability of Slurry and Adsorption Phenomenon of Polymeric Dispersant

In various industrial processes such as wet shape forming of ceramics, particles are usually applied in a slurry. In such processes, adding the appropriate amount of dispersant to the slurry is important for the production of better products. The adsorption of dispersant onto the particle surface is an important factor ; hence, many researchers have reported this phenomenon. However, few researchers have studied the effect of adsorption conformation of dispersant on dispersion stability. We investigated the effect of adsorption conformation of ammonium polycarboxylate, an adsorbed anionic polymeric dispersant with a molecular mass of 8000～10000, onto alumina. In this paper, several results of our recent research, such as the effects of additive amount of dispersant, dissolution of ion in the slurry, and effect of time at which dispersant conformation changes on dispersion stability of the slurry, are introduced.