The Need to Accurately Define and Measure the Properties of Particles

When dealing with powders, a fundamental knowledge of their physical parameters is indispensable, different methods and approaches proposed in literature. Results obtained differ widely it important to define standards be applied, both toward the investigation interpretation experimental results. The present research intends propose such standards, while defining general rules respected. Firstly, problem particle size inspected. It was found that describing not as straightforward one might suspect. Factors non-sphericity distributions make impossible put ‘size’ just number. Whereas sieving can used for coarser particles excess about 50 µm, instrumental techniques span wide range. For fine particles, occurrence cohesive forces needs overcome solvents, dispersants sample mixing need applied. Secondly, shape examined. By sphericity, irregularly shaped are described. Finally, density assemblies voidage (volume fraction voids) ways investigate them explored.