Know How

Jet milling micronization reduces particle size through particle-particle impact controlled by classifier wheel speed and feed rate. Pushing the cut point lower can raise amorphous surface content and hygroscopicity in ways a passing PSD result will not reveal. This guide covers the mechanism and the tests that actually diagnose a changed lot.

Jenike shear cells and ring shear testers measure the same yield locus through different mechanics. Here is how their sample, stress range, and time differences map onto the mass-flow versus funnel-flow hopper design decision, plus a checklist for choosing between them.

Dynamic and aerated powder testing measures basic flow energy and specific energy to fill the gap between shear cell consolidation data and Hausner ratio screening, particularly for fluidized processing and rapid-refill feeding.

Both the Hausner Ratio and Carr Index reduce bulk and tapped density to a single number. The mechanism behind that number, whether aeration, particle shape, or surface cohesion, determines whether it supports a process decision or actively misleads one.

Powder instability after conveying, filling, or transfer is often treated as [...]

Particle size distribution interpretation has the most value when the curve explains [...]

Moisture control for powders breaks down when teams treat water as one [...]

A powder release protocol is an incoming gate that protects your operating [...]

Black mass powder quality decides yield, buyer acceptance, and dispute risk. First, [...]

Powder containment performance testing turns “we think it’s contained” into measured proof. [...]

Powder dustiness is a measurable property, not a housekeeping detail. When you [...]

Representative powder sampling starts at the process, not in the lab. Always [...]