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Processes of Formation of Micro -and Nanodispersed Systems




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ISBN 9781482251456
Published November 18, 2015 by CRC Press
462 Pages 227 B/W Illustrations

 
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Book Description

Processes of Formation of Micro- and Nanodispersed Systems is a comprehensive analysis and presentation of the physical processes and phenomena that lead to the formation of disperse materials. It also details the properties of disperse materials yielded from various processes.

Special attention is given to the homogeneous condensation of metal vapours from expanding metal vapours in a vacuum, as well as heterogeneous condensation of metal vapours on solid substrates in the presence of impurities during the formation of disperse condensates. The book also examines flow in thin films, the decay of thin films, and phenomena accompanying the coalescence of disperse particles.

Using currently available data, this book compares different methods of producing disperse materials in terms of scale. It also describes several applications of the experimental results it presents, including:

  • Production of composites of nanodisperse metals in an organic matrix
  • Production of metallic powders
  • The potential to produce metallic powders on an industrial scale with the creation of a special plant
  • Fine cleaning of gases contaminated with micro- and nanoparticles, including aerosols such as spray paint

Covering and expanding applications of key processes concerning metal vapours, Processes of Formation of Micro- and Nanodispersed Systems is highly valuable to researchers of semiconductors. It provides a single source of detailed and practical information on the processes and phenomena related to the formation of disperse materials. It represents the current state of research and practice in micro- and nanodispersed systems while highlighting paths to advancement in the field.

Table of Contents

Introduction

Methodological Evaluation of the Prospects for the Development of Physical Dispersion Methods
Change in Surface Energy in Dispersion
Gas-Phase Method of Powder Production
The Method of Melting a Rotating Rod
Dispersion by a ‘Focus’ of Jets
Dispersion of the Melt Layer
Milling of Ductile Materials
Comparison of Energy Consumption in Different Methods of Powder Production
Conclusions
List of Symbols
Literature

Formulation of Experimental Studies of Homogeneous and Heterogeneous Vacuum Condensation of Metal Vapours
The Object of Research and Conditions
Calorimetry of Heterogeneous Condensation Process
A Technique for Measuring the Effectiveness of the Condensation
The Possibility of Using Electron-Beam Diagnostics to Measure the Density of Magnesium Vapours
Conclusions
List of Symbols
References

The Formation of Disperse Systems on a Solid Substrate in Heterogeneous Condensation
Critical Phenomena of Condensation in the Presence of Impurities
Model of the Kinetics of Sorption Processes on a Solid Surface, Taking into Account Chemical Reactions and Condensation
Features of the Initial Stage of Formation of Columnar Dispersed Structures on the Substrate
Effect of Gas Dynamic Parameters on the Formation of Dispersed Structures
Conclusions
List of Symbols
Literature

The Formation of Disperse Systems by Homogeneous Condensation with Vapour Jet Expansion
Methods of Calculating the Start of Homogeneous Condensation of Metal Vapours
Features of the Formulation of Experimental Research of Clustered Metal Vapour Flows
Results of Experimental Studies
Model of Inhomogeneous Origin of Clusters
Effect of Non-Condensable Impurities on Homogeneous Nucleation
Conclusions
List of Symbols
Literature

‘Genetics’ and the Evolution of the Structure of Vacuum Condensates
Homologous Matrix of Structures at the Initial Stage of Condensation
Heat and Mass Transfer on the Surface of the Crystallites in the Condensation Process
Evolution of Two-Dimensional Crystallites in the Condensation Process
The Evolution of Axially Symmetric Condensation Nuclei
Some Details of the Evolution of the Structures of the Condensate
Some Technological Advice
Conclusions
List of Symbols
Literature

The Formation of Columnar Structures in Co-Condensation of Two Components as a Way of Producing Nanosized Composites
Modernization of the Experimental Setup for Work with Lithium Electrodes of Chemical Power Sources
Formation of the Active Anode of the CPS in Joint and Stratified Condensation of Lithium and Aluminum, Lithium and Organic Matter on Electrodes
The Formation of the Porous Structure of the Polypropylene Condensate Suitable for Separators of Chemical Power Sources (CPS)
Formation of Ultrafine Lithium Powder in the Atmosphere of Electrolyte Vapours
Study of Photodesorption Processes with Periodic Exposure to Light
Conclusions
List of Symbols
Literature

Nanodisperse Zinc-Butanol Composite
Joint Condensation of Zinc and Butanol Vapours
The Hydrogen Method of Measuring the Concentration of the Dispersed Phase of Zinc in Colloids
The Kinetics of Deposition of Colloidal Particles on a Hard Surface
Information about the Technology of ‘Cold Wet Galvanizing’ of Steel
Pilot Plant for the Production of Nanocomposites
Conclusions
List of Symbols
Literature

Numerical Simulation of Molecular Processes on the Substrate
Stimulated Adsorption and Capillary Condensation
Non-Stationary Modes of Formation of Nanocomposites in Vacuum Deposition of Two-Component Vapour
Conditions for the Growth of Columnar and Fibrous Crystals
Conclusions
List of Symbols
Literature

Methods for Direct Conversion of Kinetic Energy to Surface Energy of the Disperse System
Liquid Flow in a Free Thin Film
Formation of Droplets during the Flow of Liquid from a Rotating Barrier and in Melting of a Rotating Rod
Using Taylor Bells for Dispersing Liquids
Practical Use of the Results
Conclusions
List of Symbols
Literature

Production of Metallic Powders of the Required Composition by Melting a Rotating Rod
A Brief Review of the Literature
Calculation of Cooling of Droplets
Description of the Experimental Setup
The Processes at the Electrodes
Analysis of the Powder: Size, Shape, Chemical Composition
Preparation of Powders and Granules of Metals Using Induction Heating
Discussion of the Results
The Recommendation to Create Industrial Plant
Conclusion
List of Symbols
Literature

Some Aspects of Coalescence Processes in Aerosol Systems
Experimental Studies of the Interaction of the Liquid with Hot Solids
The Generality of the Phenomena of ‘Floating Droplets,’ Film Boiling and Coalescence
Coalescence of Droplets in Non-Isothermal Conditions
Impact Spray
Findings
List of Symbols
Literature

Capture of Microparticles from Gas Flows by Condensation Processes
Features of Technology of Capture of Sprayed Paint Aerosol
Modelling of Gas Cleaning Processes to Remove Atomized Paint Particles
Experimental Study of Purification of Gas from Aerosol Particles
Recommendations for Industrial Use of the Technology and Apparatus for Trapping Particles and Vapours of Sprayed Paint
Selective Vapour Condensation on Microparticles
Findings
List of Symbols
References

Conclusion

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Author(s)

Biography

A. A. Bochkarev, Kutateladze Institute of Thermodynamics, Novosibirsk, Russia
V. I. Polyakova, Kutateladze Institute of Thermodynamics, Novosibirsk, Russia