A Study of Mechanical Dispersion of Ceramic Powder

In order to develop the dispersion technique that produces ceramic nano-particles in non-aqueous liquid with the dispersant, we have considered 100 nm barium titanate in primary size experimentally and numerically. Dispersion in the wet batch was performed using the stirred bead mill. Static light scattering (SLS) and dynamic light scattering (DLS) method respectively characterized the particle diameters. Based on the results of characterizations, it can be concluded that the dispersion conditions leading to a given particle diameter distribution are influenced by operating parameters such as bead volume fraction, stirrer speed, bead size, flow rate, and dispersants. To understand the effective dispersion mechanism, we have performed the mechanical study at numerical viewpoint. This paper presents a new method that calculates the effects of beads by using Eulerian two-phase model. The results of the stress distribution obtained by computational fluid dynamics (CFD) are compared with experimental results about particle diameter