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Showing 1 to 20 of 57 for “"Porosimetry"”.
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Using electrochemical impedance spectroscopy to characterize vertically-aligned carbon nanotube forest porosimetry
… the data collected in order to predict and model porosimetry characteristics. Porous behavior was observed in the VA-CNT electrodes of all volume fractions tested, and the impedance spectra showed that the volume fraction affected the overall impedance but not the characteristic shape of the …
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Development of analytical model relating compressive strength in porous ceramics to mercury intrusion porosimetry-derived microstructural parameters
The Ryshkewitch equation, $\sigma$ = $\sigma\sp\circ$ exp($-\beta$P), has been a classical formula representing the strength of porous ceramic materials. Here $\beta$ is an empirical constant. Hence this equation lacks the capability of relating microstructure to actual strengths, especially with …
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Investigation and computer modelling of the pore structure of paper and of consolidated pigment coatings
… pigments were measured using mercury porosimetry. Prior to this work, mercury porosimetry was rarely used in this field due to problems associated with the conventional interpretation of mercury porosimetry data. These problems were examined and two limitations of mercury porosimetry …
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MODELLING PORE-LEVEL PROPERTIES OF POROUS MATERIALS
… package, which uses information from mercury porosimetry curves, supported by image-analysed electron micrographs, to generate a three-dimensional representational model of the pore-space within a porous material. As a result of this project, a much-improved version has been produced. The …
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Porosity control of alkali-activated aluminosilicates via functional alkoxysilane additives
… of these complex systems using gas adsorption porosimetry and mercury intrusion porosimetry (MIP) were addressed. A new pore size distribution calculation using MIP results was tested and applied. Geopolymer mesoporosity could be minimized through the use of alkoxysilanes with acrylic acid or …
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ΒΕΛΤΙΩΜΕΝΗ ΜΕΘΟΔΟΣ ΑΝΑΛΥΣΗΣ ΤΗΣ ΠΟΡΩΔΟΥΣ ΔΟΜΗΣ ΔΙΑΠΕΡΑΤΩΝ ΣΤΕΡΕΩΝ: ΕΦΑΡΜΟΓΗ ΣΕ ΕΛΛΗΝΙΚΑ ΠΕΤΡΕΛΑΙΟΦΟΡΑ ΠΕΤΡΩΜΑΤΑ
… NARROW THROATS. IN THE PRESENT WORK STEP MERCURY POROSIMETRY IN CHAMBER-AND-THROAT NETWORKS IS STUDIED. FIRST, MERCURY INTRUSION-RETRACTION IN ARTIFICIAL PLANAR CHAMBER-AND-THROAT NETWORKS ETCHED IN GLASS PLATES IS STUDIED. FOR THE INTERPRETATION OF EXPERIMENTAL CAPILLARY PRESSURE CURVES A …
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Physics-based models of hysteresis in multiphase flow in porous media
… accessivity can be measured by mercury cyclic porosimetry. Our microscopic theory of hysteresis produces simple formulae that are suitable for use as hysteresis-enabling constitutive laws for capillary pressure and relative permeabilities in conventional continuum simulations of multiphase flow.
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Processing, microstructure and mechanical properties of alumina platelet reinforced 3Y-TZP and mullite composites
… in 3Y-TZP composites were determined using porosimetry and electron microscopy. The mechanical properties of the composites such as fracture strength, fracture toughness and high temperature microhardness as a function of platelet size and volume fractions were determined.
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The effect of pressure and temperature on the microstructure and mechanical properties of polycrystalline graphites
… fracture surfaces and macro porosity. Mercury porosimetry provided a means of establishing the pore size distribution of pores of less than 20 1-1m diameter. Bulk and skeletal densities were determined from mercury porosimetry and helium pycnometry respectively. The effects of PC and HTHP …
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Surface adsorption and pore-level properties of mineral and related systems of relevance to the recycling of paper
… investigated by characterising filter media with porosimetry, porometry, electron microscopy and modelling the combined results. Seven samples were studied, with pore size distributions ranging from simple unimodal to complicated bimodal. Porometry, porosimetry and SEM, individually can only …
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Mesoporous Functionalized Materials for Post-Combustion Carbon Dioxide Capture.
… structures were studied by IR spectroscopy, porosimetry, XRD, and SAXS methods. In spite of the absence of an inorganic linker, obtained bridged silsesquioxanes had mesoporous structure. A material prepared in the presence of dodecylamine as a template had higher surface area and narrow pore …
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A Study of the Effects of Irradiation and Radiolytic Oxidation of the Pore-Level Structure of Gilsocarbon Nuclear Graphite
… obtained at high pressure during mercury porosimetry, as the porosimetry data was suspected to contain inaccuracies due to damage or deformation of the graphite's microstructure caused by the analysis. The bespoke software package PoreXpert, designed at the University of Plymouth, was used …
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Towards reliable correlation of microporous layer physical characteristics and PEMFC electrochemical performance
… of MPLs were characterized by mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM) and X-ray micro computed tomography (μCT).
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Modelling and Monitoring of Phosphorus Transport and Speciation in Soil
… of soil by using water retention and mercury porosimetry curves. The model successfully predicts trends in saturated hydraulic conductivity. The effect of the assumptions used in the Pore-Cor geometry have been investigated by comparing of two dimensional slices of the simulated networks with …
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Characterization and modification of porosity in electrospun polymeric materials for tissue engineering applications
… pore diameter is first addressed. Mercury porosimetry was used to establish two physical parameters useful in electrospinning applications: average pore diameter and peak pore diameter. Average pore diameter refers to the volume-weighted average determined by the volumetric profile. Peak …
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Material invariant properties and reconstruction of microstructure of sandstones by nanoindentation and microporoelastic analysis
… from the results of mineralogy, grain size, and porosimetry experiments. A nanoindentation campaign is performed to characterize sandstones at multiple scales and an innovative technique is used to separate the various indentation responses that can occur on a heterogeneous composite. Material …
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Composite gelatin delivery system for bone regeneration
… degradation. Compressive tests and mercury porosimetry were performed to study the mechanical and structural properties of the scaffold. The biocompatibility of the scaffold was determined through cell optical imaging and DNA quantification studies. Based on findings of this research, the …
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Effects of anisotropy on the behaviour of unsaturated compacted clay
… In addition to this a series of mercur intrusion porosimetry tests, were also performed on isotropically compressed and statically compressed samples to evaluate the effects of pore size distribution on that behaviour of unsaturated soils.<br/>
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