How to determine the specific surface agent and void ratio of solid powder?
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How to measure the void ratio and specific surface area of solid powder? At present, I have chosen a nitrogen physical adsorption instrument for measurement, but the measured value is too small and the accuracy is very poor! Anyone who knows a better method or solution can give me some advice?
The method you used is basically the most mainstream method now, and it can basically be regarded as the most mature method. In the past, mercury porosimetry was used for measurement, but now it is almost no longer used. Is your current inaccurate measurement due to an instrument problem? The performance of instruments from different manufacturers varies greatly.