BET surface area Archives

Micronization by Jet Milling: How Classification, Milling Intensity, and Time Change Surface Properties
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Micronization by Jet Milling: How Classification, Milling Intensity, and Time Change Surface Properties

Bulk Solids Characterization, Know How, Milling, Particle Size Testing, Pharmaceutical Industry

Micronization by Jet Milling: How Classification, Milling Intensity, and Time Change Surface Properties

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.

By Martijn Daalder|2026-10-03T13:45:17+01:003 October 2026|Categories: Bulk Solids Characterization, Know How, Milling, Particle Size Testing, Pharmaceutical Industry|Tags: amorphous content, attrition, BET surface area, classifier wheel, DVS, hygroscopicity, jet milling, micronization, moisture sorption, particle size distribution|0 Comments

X-ray Micro-CT for Powder Pore Networks: What It Adds Beyond Gas Pycnometry and BET Surface Area
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X-ray Micro-CT for Powder Pore Networks: What It Adds Beyond Gas Pycnometry and BET Surface Area

Analytical Techniques and Methods, Bulk Solids Characterization, Insights, Permeability, Porosity

X-ray Micro-CT for Powder Pore Networks: What It Adds Beyond Gas Pycnometry and BET Surface Area

Gas pycnometry and BET surface area each report a single number. X-ray micro-CT builds a three-dimensional map of the pore network, showing connectivity, tortuosity, and closed porosity that single-value tests cannot resolve, within real resolution and sample-size limits.