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The average particle size is a value that characterizes the average thickness of the powder. There are many calculation methods for it. To give a simple example, two spheres with diameters of 1 and 10 respectively. If you are only interested in quantity, simply calculate the quantity average diameter, and the result is D[1.0]=(1+10)/2 =5.5. If you are interested in its volume, and volume is a cubic function of diameter. So the volume of a sphere with diameter 1 is 1, and the volume of a sphere with diameter 10 is 1000. In other words, the volume of the large sphere accounts for 99.9% of the total volume. At this time, D[4.3] can better reflect the volume average diameter of the particles.
D[4,3]=(14+104)/(13+103)=9.991
D[4,3] can fully represent the volume of powder, which is very important for industrial production and is suitable to be represented by D[1,0]. Which averaging algorithm is realistic depends on your actual needs.
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