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Join Date: Jul 2009
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Bulk Density and Powder Particle Size

07/13/2009 3:19 AM

bulk density will be increased with powder particle size increase or decreased?

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#1

Re: bulk density

07/13/2009 3:20 AM

Bulk density will decrease, as the size of the voids will increase with increasing particle size.

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#2

Re: bulk density

07/13/2009 3:47 AM

In the case of equal sized spherical particles packed on a cubic grid, the bulk density is independent of particle size (neglecting boundary effects).

e.g. 1 sphere in a 1 x 1 x 1 cubic container: volume of sphere (= bulk density) ≈ 0.524

For 8 spheres, volume per sphere x 8 ≈ 0.524

The same goes for 27, 64, 125 etc.

The more variation in particle size there is for a given sample, the higher the bulk density will be, as the smaller particles will tend to fill in the interstices between the larger ones.

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