How To Measure Porosity In Ceramics

The areal porosity is determined on polished thin sections of a sample.

How to measure porosity in ceramics.

A simple gravimetric method was developed to determine the open porosity in ceramic coatings. Before inserting your values make sure the units of measurement match because porosity is expressed as a percentage. Normally in the ceramic industry open porosity is determined by water absorption astm c373 standard water absorption bulk density apparent porosity and apparent specific gravity of fired. To measure ceramic porosity archaeologists have borrowed well established methods from the material sciences.

If you can determine the density of the material you can also find porosity by using the equation porosity 1 bulk density by particle density. However these methods can have drawbacks for archaeological applications including the potential to damage archaeological residues contained within the sherd the need for expensive equipment and or the use of hazardous materials. Porous ceramics are categorized as those ceramics having high percentage porosity between 20 and 95. The coating s pore space was filled with a liquid and the weight loss on volatilization of the liquid was measured in a thermogravimetric analyzer.

To learn how to calculate porosity through saturation read on. A non destructive technique for measuring ceramic porosity using liquid nitrogen. However the fragile nature of the material means that it is particularly difficult to measure. The porosity of a sample is equal to the areal porosity provided that pore structure is random.