Particle Size Distribution in Compacts of Solids

Knowledge of particle size distribution in compacts is useful in studies of porous beds and catalysts. Compacts of 2 cm. diameter of calcite, sand, quartz, barytes, marble, and soapstone in the initial particle size range of -0.200, +0.125 to -0.050, +0.040 cm. are prepared by application of pressures of 93 to 3153 kg. per sq. cm. and disintegrated into individual particles by acetone. The sizes of the disintegrated particles are determined by sieve analysis. The particle size distributions are given using a modified upper limit equation. The standard deviation is characteristic of the material. An equation relating mean diameter of size distribution to the initial particle size and surface energy of material, diameter of compact, and pressure of compaction is presented on the basis of dimensional analysis and experimental data. © 1968, American Chemical Society. All rights reserved.