# Particle size distribution

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.

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:

fraction | weight percentage |
---|---|

< 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.

Sieve tower | Laser Diffraction Analysis Apparatus |