The Role of Particle Interactions on Suspension Rheology-Application to Submicron Grinding in Stirred Ball Mills

摘要

The superior performance of many products like paints, fillers, pigments, ceramics, or pharmaceuticals depends on the specific properties of nano-particles. The increasing demand for nano-particles can only be satisfied by economical industrial processes. In liquid phase processes high particle concentrations are therefore a basic precondition. Particle-particle interactions play a dominant role in the submicron size range strongly influencing the suspension rheology which in turn is often the limiting factor for the production process due to various rheological, non-Newtonian phenomena including shear thinning, shear thickening, yielding, and thixotropy. Thus, the control of the flow behavior of these suspensions is critically important to both the energetics of the process and to the performance of the unit operation itself, e.g. filtration, grinding, precipitation, or coating.