The particle size distribution of a powder can be determined in two different ways: by means of a sieve analysis and by means of a laser diffraction analysis.
Particle size distribution
With a sieve analysis the original sample is sieved into several fractions by means of a sieve tower. The partitioning is determined by weighing the different fractions. An example of particle size distribution made by a sieve analysis is presented in the table below:
|< 63 µm||56.00 %|
|63 µm < x < 125 µm||40.35 %|
|125 µm < x < 200 µm||3.20 %|
|200 µm < x < 500 µm||0.25%|
|> 500 µm||0.20%|
A second possibility determining the particle size distribution is by means of a laser diffraction analysis. The particle size distribution can be determined with the laser diffraction apparatus HORIBA LA 950 V2 according to the standard ISO 13320. This apparatus has a liquid and a dry dispersion unit and provides a wide dynamic range from 0.01 µm to 3000 µm.