4. pore size distribution
Porosity of powders and porous solids can be measured by different techniques based on adsorption of inert gases. Physical gas adsorption or physisorption is important in the determination of porosity in general and more specific the specific surface area (BET surface area, according to the Brunauer, Emmet and Teller theory), pore volume and pore size distribution of porous materials and non- porous materials.
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