Characterization of Powders and Aerosols

Characterization of Powders and Aerosols

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Characterization of fine particles is a difficult task! A large number of industries deal with materials in powder form. The properties of these powders depend on their particle size, particle shape and size distributions, surface and porosity. What are the methods? What are the problems? What questions need answering? This new book covers the problems of sampling both powders and aerosols, and discusses calibration standards for different instruments. It takes into account fractionating methods for fine particles, e.g., sieving procedures, sedimentation methods, and the use of cyclones. Image analysis and its use for the measurement of the size and shape of powder grains and light-diffraction techniques for size evaluation are presented. Furthermore, this books covers the most effective methods for measuring surface areas, fractal structures of rough surfaces, and pore structures of porous bodies. Practitioners will find tips for modification of analytical procedures for on-line characterization, and many graphs for comparing data obtained by different methods are presented.... standard substance. It can be seen that, if standard porosity is used, the equation can be simplified still further to the form T 1/2 5W = 53 Y (9.7) s Ober and Frederick [23] have extensively studied the use of the variable-pressure permeameter in the cement industry and recommend that the porosity function 85 / (1 a€” $5)2 of equation 9.6 should be replaced by the function 8 5/(0.850 a€” 8)? ... For comparative purposes, permeability can then be expressed in arbitrary units of {810/ (1anbsp;...

Title:Characterization of Powders and Aerosols
Author:Brian H. Kaye
Publisher:John Wiley & Sons - 2008-07-11


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