ABSTRACT
A detailed and systematic interpretation of the influences of morphology on the flow of pastes will be helpful in the optimization of such advanced material systems. Similar behavioral trends in relation to the influence of powder morphology would be observed using an analysis based on the concept of conventional viscosity. Frequently, the powders employed are not ideal; they may be natural or chemically designed and their composition will be governed by the final product requirements. Their shape may be irregular, fibrous, or platelike and further more; such powders may come in a wide range of sizes and size distributions. The concepts of bimodal mixing can be taken a stage further by the addition of a third powder to form trimodal mixtures. Optimum packing occurs when a medium-size fraction of spheres is of a size able to just fill the interstitial voids in the coarse powder and the fine powder is infinitely small.
