How to Measure Pore Size Distribution?
Pore size distribution is a key metric in materials research and development (R&D), underlying a range of critical performance properties. Though intrinsically linked to total pore size and overall porosity, the distribution of pores within a solid body is unique in that it indicates structural complexity in much greater detail.
Most bulk solids comprise some empty spaces (apertures, cavities, voids, etc.) which often manifest in an interconnected network. When measuring pore size distribution and other important metrics of porosity, researchers only consider an accessible, contiguous open space within the sample. Isolated pockets within solids (i.e. vesicles), therefore, are not considered part of the porous structure.
This distinction is important for two primary reasons. Firstly, the accessibility of porous structures is fundamental to their functionality/performance. Secondly, most methods of measuring porosity involve fluidic intrusion.
Tomography: Measuring Pore Size Distribution