Ceramic Powders: Electrostatic Repulsion and Steric Stabilization

This lecture delves into the electrostatic repulsive forces in ceramic powders, discussing the origins of these forces, the concept of the double layer, and the formation of an ionic cloud around particles. It also explores the role of steric stabilization induced by the adsorption of molecules on particle surfaces, the effect of different parameters on total interaction energy, and the rheology of ceramic suspensions. The presentation covers the evolution of viscosity as a function of pH, the impact of zeta potential on rheological properties, and the reasons for granulating powders, using dry pressing as an example.