AutoPore IV Features:
The term "porosimetry" is often used to include the measurements of pore size, volume, distribution, density, and other porosity-related characteristics of a material. Porosity is especially important in understanding the formation, structure, and potential use of many substances. The porosity of a material affects its physical properties and, subsequently, its behavior in its surrounding environment. The adsorption and permeability, strength, density, and other factors influenced by a substance’s porosity determine the manner and fashion in which it can be appropriately used.
The mercury porosimetry analysis technique is based on the intrusion of mercury into a porous structure under stringently controlled pressures. Besides offering speed, accuracy, and a wide measurement range, mercury porosimetry permits you to calculate numerous sample properties such as pore size distributions, total pore volume, total pore surface area, median pore diameter, and sample densities (bulk and skeletal).
The AutoPore IV Series Mercury Porosimeters can determine a broader pore size distribution (0.003 to 1100 micrometers*) more quickly and accurately than other methods. These instruments are enhanced with features that enable them to more accurately gather the data needed to characterize the porous structure of solid materials. They also offer new data reduction and reporting choices that provide more information about pore geometry and the fluid transport characteristics of the material.
*Calculated with an initial filling pressure of 0.2psia (0.00128MPa)
Wide Variety of Benefits:
- Controlled pressure can increase in increments as fine as 0.05 psia from 0.2 to 50 psia. This allows detailed data to be collected in the macropore region.
- A quick-scan mode allows a continuous pressure increase approximating equilibrium and providing faster screening. The high repeatability and reproducibility of this method by the AutoPore means that small, but significant, differences between samples will be detected. You can use this technique to screen a sample for conformity to specification because repeatability remains high.
- High-resolution (sub-microliter) measurement of intrusion/extrusion volumes produces extraordinary precision allowing the development of tighter sample specifications, improved production processes, and high-quality research data.
- A choice of correction routine for baseline (automatic, differential, or manual) produces greater accuracy by correcting for compressibility and thermal effects caused by high pressure.
- Choice of pressure ramping methods lets you choose the scanning technique for high-speed or on-demand results, or equilibration techniques for more accurate results with greater detail.
- The instrument allows the user to program data collection using a minimum number of data points. However, during intervals of unexpectedly large amounts of intrusion, the AutoPore will automatically collect additional data points.
- Choose between three data plot routines constructed of collected data points, a continuous curve plotted from interpolated data, or a combination of points and curves.
- A variety of pore volume, pore area, and pore size plots is available as well as the ability to calculate total intrusion volume, total pore (surface) area, median pore diameter, average pore diameter, bulk density, and apparent (skeletal) density.
- Capability to measure pore diameters from 0.003 to ~1100 µm*
- Low noise, high-pressure generating system
- Enhanced data reduction package; includes tortuosity, permeability, compressibility, pore-throat ratio, fractal dimension, Mayer-Stowe particle size, and more
- Operates in scanning and time – or rate – equilibrated modes
- Collects extremely high-resolution data; better than 0.1 µL for mercury intrusion and extrusion volumes
- Controlled evacuation prevents powder fluctuation
The AutoPore offers various options for obtaining important sample information as quickly as possible and for presenting the data in a format which you can design. Analysis options include choice of analysis variables, equilibration techniques, and pressure points at which data are collected. After operating conditions for the instrument have been chosen, they can be stored as a template and then reapplied to other samples, saving time and reducing the potential for human error.
A selection of report options lets you customize many aspects of the data pages. You can select a specific range of data to be used in calculations; arrange columns of tabular data; select cumulative, incremental, or differential plots; scale the X-axis to display in either logarithmic or linear format for pore size; report actual or interpolated data; and select data presentation units such as psia or MPa, diameter or radius, and micrometers or Angstroms.
The AutoPore IV generates tabular and graphical reports of percentage pore volume vs. diameter, and a summary report of percentage porosity in user-defined size ranges. The user has the ability to average several analyses and to use the ‘resulting average’ analysis as a reference with which to compare subsequent analyses. A standard, single, user-defined analysis may also be entered and used for subsequent comparisons. SPC reports are available with collected data or user-defined parameters. In addition to the standard data reduction methods, the AutoPore IV Series also provides the following:
- Mayer-Stowe Particle Size - Reports equivalent spherical size distributions
- Pore Tortuosity - Characterizes the efficiency of the diffusion of fluids through a porous material
- Material Compressibility - Quantifies the collapse or compression of the sample material
- Pore Number Fraction - Reports the number of pores in different size classes
- Pore-throat Ratio - Reports the ratio of pore cavities to pore throats at each percent porosity filled value
- Pore Fractal Dimensions - Quantifies the fractal geometry of a material
- Permeability - Reports the ability of the sample to transmit fluid