Bulk density determination method density (
Bulk density
) Ï
b
Is the mass of the powder divided by the volume of the container occupied by the powder
V
The density obtained, also known as
Bulk density
, which is
Ï
b
=W/V
.
When the powder is filled, the density measured by a certain regular vibration or tapping is called the real density (Tap density
)
Ï
Bt
.Determination:
The volume measured by filling the powder into the container includes the true volume of the powder, the voids in the particles, the voids between the particles, and the like. Therefore, the shape and size of the measuring container, the filling speed of the material, and the filling method affect the volume of the powder. When the powder is filled in the measuring container, the density measured is the most bulk density without applying any external force, and the density measured by applying an external force to make the powder in the tightest filling state is called the tightest density. Tap density with oscillation (
Tapping
The number of times changes, and the measured tap density is the tightest density when the final oscillation volume is constant. (In fact, the particles are weighed and placed in a measuring cylinder, slamming down, recording the volume,
w/v
. Be careful not to smash the cylinder. )
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