THE PACKING DENSITY OF BINARY POWDER MIXTURES

The maximum particle packing density in a binary powder system can be predicted by the Furnas model. The packing density is lower when the s ize ratio of coarse particles to fine particles decreases, and is also governed by the volume fraction of coarse or fine particles. Here an empirical equation is derived which describes the packing density as a function of the initial packing efficiencies of particles, the partic le size ratio, and the volume fraction variations of the system.