About the Book
Part of a series on materials which exist in the form of a disperse system such as powders, pastes, slurries, emulsions and aerosols this is a survey of particle size measurement, which has been revised to include a new chapter concerning on-line particle size analysis and descriptions of recently developed instrumentation. The text will benefit chemical and process engineers concerned with all aspects of powder technology. The industrial applications of this new science are far reaching. The size of the fine particles affects the properties of a powder in many important ways. For example, it determines the setting time of cement, the hiding power of pigments and the activity of chemical catalysts; the taste of food, the potency of drugs and the sintering shrinkage of metallurgical powders are also strongly affected by the size of the particles of which powder is made up. Particle size measurement is to powder technology as thermometry is to the study of heat and is in the same state of flux as the thermometry was in its early days. The author is chairman of the Particle Size Analysis Group of the Society for Analytical Chemistry.
Table of Contents:
Sampling of powders; sampling of dusty gases in gas streams; sampling and sizing from the atmosphere - air technology, Atcor Net 2000, Bausch and Lomb, Beckman, Centre for Air Environmental Studies, Climet Series 7000, Coulter Model 550 contamination monitor, Dynac, Gardner, G.C.A. Miniram, Insitec PCSV-P, Kratel Partoscope, Leitz Tyndalloscope, Met One particle counters, Pacific Scientific Hiac/Royco particle counting systems, particle measuring systems, RAC particle monitors, Rotheroe and Mitchell digital dust indicator, Saab photometer, Sartorius, Sinclair. Particle size, shape and distribution - shape regeneration by Fourier analysis, the Rosinn-Rammler distribution, mean particle sizes and specific surface evaluation for Rosinn-Rammler distribution. Sieving; microscopy; interaction between particles and fluids in a gravitational field; dispersion of powders; incremental methods of particle size determination;cumulative methods of sedimentation size analysis; fluid classification - the Warmain cyclosizer, the Humboldt particle size analyzer TDS, the cross-flow elbow classifier, the Bahco classifier, the BCURA centrifugal elutriator, Analysette 9, the Donaldson classifier, the Micromeritics classifier. Centrifugal methods - early instruments - the Marshall centrifuge and the MSA particle size analyser, the Alpine sedimentation centrifuge, the Mikropul Sedimentputer, the LADAL X-ray centrifuge, the LADAL pipette withdrawal centrifuge. The electrical sensing zone method of particle size distribution determination (the Coulter principle); radiation scattering methods of particle size determination; high-order Tyndall spectr (HOTS); permeametry and gas diffusion - alternative derivation of Kozeny's equation using equivalent capillaries. Gas adsorption - BET isotherm for multilayer adsorption, comparison between BET and HJr methods, the Frenkel-Halsey-Hill equation (FHH), the Dubinin-Radushkevich equation (D-R), Kiselev's equation. Other methods for determining surface area - Langmuir trough, Gravimetric method, the Rayleigh interferometer. Determination of pore size distribution by gas adsorption - the Kelvin equation. On-line particle analysis - Brinkmann analyser, Climet particle counting systems, Flowvision, Hiac/Royco (Pacific Scientific) particle counters, Horiba particle size analysers, the Insitic particle counter, Kane May particle size analysers, Kratel Partascope, Lasentec, Talbot optical-electronic method, the Erdco acoustical counter, the Coulter on-line monitor; screening - the Cyclosensor, non-Newtonian rheological properties. Appendix 1 Equipment and suppliers, manufacturers' and suppliers' addresses.
