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Author: Merle Leroy Dundon Publisher: Forgotten Books ISBN: 9780267223015 Category : Science Languages : en Pages : 28
Book Description
Excerpt from The Solubility and Surface Energy of Fine Powders: A Dissertation Presented in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Graduate School of the Ohio State University In the present paper and the one which follows, we have repeated some of Hulett's work and have extended his general experimental method to several other substances in an effort to obtain reliable values for their surface energy. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Merle Leroy Dundon Publisher: Forgotten Books ISBN: 9780267223015 Category : Science Languages : en Pages : 28
Book Description
Excerpt from The Solubility and Surface Energy of Fine Powders: A Dissertation Presented in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Graduate School of the Ohio State University In the present paper and the one which follows, we have repeated some of Hulett's work and have extended his general experimental method to several other substances in an effort to obtain reliable values for their surface energy. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Yasuo Arai Publisher: Springer Science & Business Media ISBN: 9400914938 Category : Technology & Engineering Languages : en Pages : 291
Book Description
Chemistry of Powder Production focuses on the solid-state chemistry of powder materials and relates this to the structure, properties and preparation, and characterization techniques for these important industrial products. Additionally, the properties of the particles are discussed in relation to their surface structure and characteristics. This book describes the fundamentals of statistical methods for measuring the characteristics of particles. New advanced materials being developed in powder technology manufacturing techniques are also emphasised, including powdered materials for advanced ceramics as well as magnetic and pigment materials.
Author: S. Lowell Publisher: Springer Science & Business Media ISBN: 9401579555 Category : Technology & Engineering Languages : en Pages : 261
Book Description
The rapid growth of interest in powders and their surface properties in many diverse industries prompted the writing of this book for those who have the need to make meaningful measurements without the benefit of years of experience. It is intended as an introduction to some of the elementary theory and experimental methods used to study the surface area, porosity, density, and particle size of powders. It may be found useful by those with little or no training in solid surfaces who have the need to learn quickly the rudiments of surface area, density, pore size, and particle size measurements. S. Lowell J.E. Shields Symbols Use of symbols for purposes other than those indicated in the following table are so defined in the text. Some symbols not shown in the table are also defined in the text. d adsorbate cross-sectional area A area; condensation coefficient; collision frequency C BET constant c concentration D diameter; coefficient of thermal diffusion E adsorption potential permeability aspect factor f F flow rate; force; feed rate g gravitational constant G Gibbs free energy S G free surface energy h heat of immersion per unit area; height H enthalpy heat of immersion Hi heat of adsorption Hsv BET intercept; filament current k thermal conductivity; specific reaction rate K Harkins-Jura constant C length L heat of liquefaction M mass M molecular weight MPa megapascals number of moles n number of molecules; number of particles N N Avogadro's num'ber molecular collisions per square cm per second
Author: K. Rietema Publisher: Springer Science & Business Media ISBN: 9401136726 Category : Technology & Engineering Languages : en Pages : 274
Book Description
flour, potato starch, cracking catalyst, sand, and gravel, one will probably agree that the first four materials definitely are powders and the last one certainly is not. Whether one would call sand a powder probably depends on the partiele size and on personal Vlews. When the astronaut Neil Armstrong returned to the Earth from his trip on the surface of the Moon, he stated: 'The surface is fine and powdery. I can kick it up loosely with my toe. It does adhere in fine layers like powdered charcoal to the sole and inside of my boots. I only go in a small fraction of an inch, but I can see the footprints of my boots and the treads in the fine sandy partieles. ' These words elearly show that the behaviour of powders de pends on the circumstances. In wh at respects are those on the Moon different from those on the Earth? (1) The gravitational force on the surface of the Moon is only one-sixth of that on the Earth. (2) There is no gas on the Moon. The latter aspect means that any water brought there would evaporate and disappear immediately, hence powders on the Moon will always be perfect1y dry so that cohesion between the separate partieles due to liquid bridges will be zero.
Author: Seymour Lowell Publisher: Springer ISBN: 9789401089531 Category : Science Languages : en Pages : 234
Book Description
The rapid growth of interest in powders and their surface properties in many diverse industries prompted the writing of this book for those who have the need to make meaningful measurements without the benefit of years of experience. It is intended as an introduction to some of the elementary theory and experimental methods used to study the surface area, porosity and density of powders. It may be found useful by those with little or no training in solid surfaces who have the need to quickly learn the rudiments of surface area, density and pore-size measurements. Syosset, New York S. Lowell May, 1983 J. E. Shields Xl List of symbols Use of symbols for purposes other than those indicated in the following list are so defined in the text. Some symbols not shown in this list are defined in the text. d adsorbate cross-sectional area A area; condensation coefficient; collision frequency C BET constant c concentration D diameter; coefficient of thermal diffusion E adsorption potential f permeability aspect factor F flow rate; force; feed rate 9 gravitational constant G Gibbs free energy GS free surface energy h heat of immersion per unit area; height H enthalpy Hi heat of immersion Hsv heat of adsorption BET intercept; filament current k thermal conductivity; specific reaction rate K Harkins-Jura constant I length L heat of liquefaction M mass M molecular weight n number of moles N number of molecules; number of particles N Avagadro's number .
Author: Ashish Sharma Publisher: ISBN: Category : Humidity Languages : en Pages : 280
Book Description
The thin layer wicking technique was used for surface energy estimation, and the avalanching behavior of powders was studied to evaluate dynamic powder flow behavior. Avalanching flow behavior for different particle sizes and relative humidities was studied on an avalanching equipment. The tests established the presence of fractal plots in the avalanching behavior. The powders having fines showed presence of more than one slope in the fractal plots. Based on fractal plot studies, powders were found to less free flowing with an increase in humidity and fines content. Larger monosized particles were found to be more free flowing as compared to fine particles.
Author: Merle Leroy Dundon
Author: Merle Leroy Dundon
Author: Merle Leroy Dundon
Author: Merle Leroy Dundon
Author: Yasuo Arai
Author: S. Lowell
Author: G. D. Parfitt
Author: K. Rietema
Author: United States. Wright Air Development Division
Author: Seymour Lowell
Author: Ashish Sharma