1. D50 refers to the corresponding particle size when the cumulative particle size distribution percentage of a sample reaches 50%.
2. Its physical meaning is that 50% of the particles are larger than it, and 50% of the particles are smaller than it. D50 is also called median or median particle size.
3. Similarly, D10 and D90 are used to represent the diameters of the accumulated 10% and 90% points respectively, which are the equivalent diameters (average particle diameters) of the largest particles when the cumulative distribution is 10% and 90% in the distribution curve.
4. The particle size of powder materials can be measured by screening method, sedimentation method, resistance method, laser method, electron microscope method and other methods.
