Permeability and Tortuosity MeasurementSample permeability and tortuosity measurement is offered as an extension to our standard mercury porosimetry analysis options. The analysis also includes pore size, pore volume and pore area characterisation in the pore size range 3.5 nm to 650 µm as well as bulk density, skeletal density and absolute (% volume) porosity. Porosity and permeability are, therefore, determined in a single analysis which provides a wealth of information in a short time-frame. Permeability is a measure of fluid or gas flow through a porous solid sample. It is, therefore, of considerable interest in applications where a solid material interacts with a liquid or gas. Permeability measurement from mercury intrusion analysis was originally developed with regard to geological samples, but it has since found significant application to a wide variety of sample types and sectors. Pore tortuosity, obtained from characteristics of pore size, pore volume, pore area and permeability is a measure of the tortuous pathway of pores through a sample: essentially a representation of how direct the pore pathway is as it passes through a sample. This can be particularly useful when comparing samples.
Key ApplicationsInvestigation of relationship between solid and fluid mediaPassage and retention capabilities of fluids and gases Geological and geo-technical testingPetrology and HydrologyBattery electrodes: electrolyte flow & active site accessibilityBattery separators: electrolyte flow propertiesCatalyst testing: accessibility to active sitesPharmaceuticals: dissolution and disintegration propertiesFilter media: flow and retention propertiesMembranes and papers: flow throughout propertiesCeramics: flow throughput and capacity properties
The calculation of permeability requires the threshold pressure of mercury intrusion, bulk sample density and absolute sample density. Density values are calculated from the accompanying mercury intrusion analysis whilst determination of threshold pressure from the mercury intrusion curve requires an abundance of data measurement points. Our in-house data reduction protocols ensure that the most appropriate values are selected and applied to provide the most accurate permeability of each specific sample analysed. Pore tortuosity requires sample permeability and additionally a measure of pore area, which can also be applied directly from the accompanying mercury intrusion data.
Analytical Options and Highlights Measurement of sample permeability and tortuosityAssessment of fluid & gas flow characteristics through a sampleAssessment of pore pathway through a sampleAdditional characterisation of sample porosity Pore volumePore size distributionPore AreaCalculation of bulk and skeletal densityCalculation of absolute (% volume) porosityOption for additional mercury extrusion analysisGraphical and numerical data reports
At MCA Services we have decades of experience in the analysis and characterisation of materials and are always happy to discuss specific samples and applications. The flexibility of our analytical options combined with our expertise ensures that the most appropriate analytical test, or combination of tests, are selected for your particular sample, application and requirements. We also provide assistance with the interpretation of results and more information about these analytical options and the background operation and theory can be found on our YouTube channel.
MCA Services
01763 262333
Permeability and Tortuosity MeasurementSample permeability and tortuosity measurement is offered as an extension to our standard mercury porosimetry analysis options. The analysis also includes pore size, pore volume and pore area characterisation in the pore size range 3.5 nm to 650 µm as well as bulk density, skeletal density and absolute (% volume) porosity. Porosity and permeability are, therefore, determined in a single analysis which provides a wealth of information in a short time-frame. Permeability is a measure of fluid or gas flow through a porous solid sample. It is, therefore, of considerable interest in applications where a solid material interacts with a liquid or gas. Permeability measurement from mercury intrusion analysis was originally developed with regard to geological samples, but it has since found significant application to a wide variety of sample types and sectors. Pore tortuosity, obtained from characteristics of pore size, pore volume, pore area and permeability is a measure of the tortuous pathway of pores through a sample: essentially a representation of how direct the pore pathway is as it passes through a sample. This can be particularly useful when comparing samples.
Key ApplicationsInvestigation of relationship between solid and fluid mediaPassage and retention capabilities of fluids and gases Geological and geo-technical testingPetrology and HydrologyBattery electrodes: electrolyte flow Battery Electrodes: active site accessibilityBattery separators: electrolyte flow propertiesCatalyst testing: accessibility to active sitesPharmaceuticals: dissolution and disintegration propertiesFilter media: flow and retention propertiesMembranes and papers: flow throughout propertiesCeramics: flow throughput and capacity properties
The calculation of permeability requires the threshold pressure of mercury intrusion, bulk sample density and absolute sample density. Density values are calculated from the accompanying mercury intrusion analysis whilst determination of threshold pressure from the mercury intrusion curve requires an abundance of data measurement points. Our in-house data reduction protocols ensure that the most appropriate values are selected and applied to provide the most accurate permeability of each specific sample analysed. Pore tortuosity requires sample permeability and additionally a measure of pore area, which can also be applied directly from the accompanying mercury intrusion data.
Analytical Options and Highlights Measurement of sample permeability and tortuosityFluid & gas flow characteristics through a sampleAssessment of pore pathway through a sampleAdditional characterisation of sample porosity Pore volumePore size distributionPore AreaCalculation of bulk and skeletal densityCalculation of absolute (% volume) porosityOption for additional mercury extrusion analysisGraphical and numerical data reports
At MCA Services we have decades of experience in the analysis and characterisation of materials and are always happy to discuss specific samples and applications. The flexibility of our analytical options combined with our expertise ensures that the most appropriate analytical test, or combination of tests, are selected for your particular sample, application and requirements. We also provide assistance with the interpretation of results and more information about these analytical options and the background operation and theory can be found on our YouTube channel.