Porosimetro de mercurio

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AutoPore IV Series
Automated Mercury Porosimeters

AutoPore IV Series

Automated Mercury Porosimeters

B e h i n d

t h e P r o d u c t Key Advantages Of Mercury Porosimetry
Mercury porosimetry can determine a broader pore size distribution more quickly and accurately than other methods. It can be used to characterize pores ranging from 0.003 µm to 360 µm using asingle theoretical model. The data produced (mercury intrusion volume at various pressures) can be used to calculate numerous sample characteristics such as pore size distributions, total pore volume, total pore surface area, median pore diameter, and sample densities (bulk and skeletal).

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Relating Mercury Intrusion Pressure And Pore Size
Mercury porosimetry uses the Washburn equation to describe the intrusion of mercury into a porous material as a function of pressure applied to the mercury. Mercury is used because it is non-wetting and non-reactive for most solidsurfaces. It also has a contact angle of about 130° for most solids and therefore requires the application of pressure before it will intrude into pores. The AutoPore IV software allows you to enter the precise angle of contact between mercury and a solid sample surface. (For determining the exact contact angle, Micromeritics offers the Contact Anglometer Model 1501.) You can enter values for theadvancing contact angle (intrusion), receding contact angle (extrusion), and mercury surface tension either before or after the analysis as need dictates. To cause mercury to intrude sample pores, the AutoPore IV increases the pressure on the mercury inside the penetrometer (sample holder). The pressure required to force mercury into the pores of the sample is inversely proportional to the size...