Particle Size Characterisation

This lecture covers the characterisation of particle size in powders, focusing on techniques such as laser diffraction, sedimentation, and X-ray disc centrifuge. It discusses the challenges of analysing non-spherical particles and the importance of equivalent spherical diameter. The presentation delves into the theory and reality of particle shape, limitations in shape analysis, and the impact of particle morphology on different measurement methods. Additionally, it explores the concepts of porosity, agglomeration factor, and specific surface area determination using nitrogen adsorption. The lecture concludes with a detailed explanation of the BET model for specific surface area measurement and the use of mercury intrusion porosimetry for porosity analysis.