Textural characterization

Molera, J., M. Vendrel Saz, and J. Perez (2001), Chemical and textural characterization of tin glazes in Islamic ceramics from eastern Spain, /. Archaeol. Sci. 28, 331-340. 

Porous texture characterization of all the samples was performed by physical adsorption of N2 at 77K. and CO2 at 273K, using an automatic adsorption system (Autosorb-6, Quantachrome). The micropore volume, Vpp (N2), was determined by application of Dubinin-Radushkevich equation to the N2 adsorption isotherm at 77K up to P/Po< 0.1. The volume of narrow micropores, Vnpp (DR,C02>, (mean pore size lower than 0.7 nm) was calculated from CO2 adsorption at 273 K. 

The NiO phase could be reduced to metallic Ni by hydrogen treatment (723 K, 1 h). The crystallite size of Ni metal (estimated from XRD pattern of the reduced sample) is similar to that of the NiO in the unreduced sample (e.g., for 7B, the Ni metal crystallite size is 8.2 nm). The textural characterization studies reveal that for the samples prepared by coprecipitation + digestion and hydrothermal synthesis (methods B and C) the pore sizes are in the mesopore range (2.9 to 6.8 nm) (Table 11.2). 

Pedreschi, F., Aguilera, J. M., Pyle,L. (2001). Textural characterization and kinetics of potato strips during frying. 

LX-02 is a material of putty-like texture characterized by ability to propagate in very small diameters... 

Fiber Diameter and Porous Texture Characterization by Physical Adsorption of N2 at 77 K and C02 at 273 K... 

Preparation Conditions and Porous Texture Characterization Corresponding to the Raw and Activated Isotropic Carbon Fibers... 

Linares-Solano A. Textural characterization of porous carbons by physical adsorption of gases. In Figuereido JL, Moulijn JA, eds. Carbon and Coal Gasification, the Netherlands Martinus Nijhoff Publishers. 1986 pp. 137-180. 

Pons MN, Mona H, Drouin JF, Vivier H (1995) Texture characterization of colonies on solid substrate. Proc CAB6, Garmisch-Partenkirchen, Elsevier, p 189... 

The porous textural characterization of activated carbons is a very important subject due to the growing interest in the preparation of materials with well-defined pore structures and high adsorption capacities. Porosity characterization is an essential task to foresee their behavior in a given use and requires a combination of different techniques. Gas adsorption techniques constitute the most common approach to the characterization of the pore structure of porous materials. However these techniques have some limitations. 

Table 1.- Fiber diameter and porous texture characterization results...

Incorporation of appropriate contact angles in textural characterization by mercury porosimetry... 

In this contribution we have evaluated the importance of incorporating the measured contact angle (by advancing and static angle methods) in the textural characterization of porous materials by MIP. 

The nitrogen adsorption isotherms obtained with both series of activated carbons were of type I, corresponding to microporous materials. The results of the textural characterization are shown in tables 1 and 2. The last column in both tables was calculated from the CO2 adsorption data, the remaining parameters being determined from the nitrogen adsorption data... 

Texture characterization of ultramacroporous materials using non-destructive methods... 

Textural characterization was performed by N2 adsorption-desorption at 77 K using a Micromeritics ASAP 2010 analyzer. The samples were preheated under vacuum in three steps of Ih at 423 K, Ih at 513 K, and finally 4 h at 623 K. BET specific surface area, Sbet, was calculated using adsorption data in the relative pressure range, P/Po, from 0.05 to 0.2. Total pore volume, Vp , was estimated by Gurvitsch rule on the basis of the amount adsorbed at P/Po of about 0.95. The primary mesopore diameter, Dp, was evaluated using the BJH method from the desorption data of the isotherm. The primary mesopore volume, Vp, and the external surface area, Sext were determined using the t-plot method with the statistical film thickness curve of a macroporous silica gel [5]. 

Textural characterization of montmorillonite pillared with aluminum/lanthanum polyoxycations... 

Truong, V. D. and Daubert, C. R. 2001. Textural characterization of cheeses using vane iheometry and torsion analysis, y. FoodSci. 66 716-721. 

Hydrogen isotope data for mantle xenoliths is usually acquired on hydrous minerals such as amphibole and mica. One problem is that early studies did not texturally characterize mica occurrences and so the information is of limited value. Perhaps the best-documented study is that... 

Textural characterization. The nitrogen and argon isotherms were obtained at liquid nitrogen and liquid argon temperature by using a Micromeritics ASAP 2010 apparatus (static volumetric technique). Before determination of adsorption-desorption isotherms the samples ( 0.2 g) were outgassed for 16 h at 350 °C under vacuum. 

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