Chemical vapor synthesis of inorganic nanopowders / H. Y. Sohn.

Format:

Book

Author/Creator:

Sohn, Hong Yong.

Series:

Chemistry Research and Applications/Nanotechnology Science and Technology

Chemistry research and applications

Nanotechnology science and technology

Language:

English

Subjects (All):

Chemical vapor deposition.

Nanoparticles.

Organic compounds--Synthesis.

Organic compounds.

Physical Description:

1 online resource (223 p.)

Edition:

1st ed.

Place of Publication:

New York : Nova Science Publishers, c2012.

Language Note:

English

Summary:

Materials in the form of ultrafine or nanosized powders display many useful physical, mechanical and chemical properties. The properties of nano-scaled materials are significantly different from atoms and bulks materials arise mainly from large fraction of surface atoms, high surface energy and reduced imperfections. The effects of grain size on mechanical properties have been recognized and generated much interest. It would therefore be advantageous if compounds can be produced in fine powder form from inexpensive raw materials using less energy. Their small sizes also improve hardness, fracture toughness and low-temperature ductility as well as catalytic and interfacial processes. Nanomaterials also enable lower processing temperatures compared with bulk materials and faster reaction time due to their higher surface reactivity. Thus, the production of nanosized powder is an important industrial process and is explored in this technical and informative book.

Contents:

Intro

CHEMICAL VAPOR SYNTHESIS OFINORGANIC NANOPOWDERS

LIBRARY OF CONGRESS CATALOGING-IN-PUBLICATION DATA

CONTENTS

PREFACE

Chapter 1 INTRODUCTION

1.1. PROMISES AND APPLICATIONS OF NANOMATERIALS

1.2. METHODS OF PRODUCTION

1.3. CHEMICAL VAPOR SYNTHESIS

Chapter 2 PRINCIPLES OF CHEMICAL VAPOR SYNTHESIS

ABSTRACT

2.1. THERMOCHEMICAL CONSIDERATIONS

2.2. CHLORIDE-BASED REACTIONS

2.3. PLASMA-ASSISTED REACTIONS

2.4. FLAME SYNTHESIS

Chapter 3 METALLIC NANOPOWDERS

3.1. EARLY WORK ON METAL POWDERS

3.2. TUNGSTEN NANOPOWDER - PLASMA-ASSISTED

Plasma Synthesis

Product Characterization

Post-Treatment

3.3. ALUMINUM POWDER BY MAGNESIUM REDUCTION

Experimental Work

Results

Conclusion

3.4. TITANIUM POWDER BY MAGNESIUM REDUCTION

3.5. COMPOSITE NANOPOWDERS

Magnesium-Titanium

Magnesium-Aluminum

Tungsten-Cobalt

Chapter 4 INTERMETALLIC AND ALLOY POWDERS

4.1. TITANIUM ALUMINIDES BY MAGNESIUM REDUCTION

Experimental Results

4.2. NICKEL ALUMINIDES BY MAGNESIUM REDUCTION

Thermodynamic Equilibrium Analysis

4.3. NICKEL ALUMINIDES BY HYDROGEN REDUCTION

4.4. OTHER INTERMETALLIC AND ALLOY POWDERS

Synthesis of Fe-Co Powders

Synthesis of NiMo Powders

Preparation of Ni4Mo Coating on Nickel Substrate

Chapter 5 TUNGSTEN CARBIDE NANOPOWDER

5.1. SYNTHESIS FROM TUNGSTEN CHLORIDE

Early Investigations

Recent Work on Nano-Sized Powder

5.2. PLASMA-ASSISTED SYNTHESIS

From WCl6-CH4-H2 Mixtures

From Ammonium Paratungstate (APT)

5.3. SYNTHESIS FROM TUNGSTEN CARBONYL

Chapter 6 TUNGSTEN CARBIDE - COBALT COMPOSITE NANOPOWDER

6.1. SYNTHESIS FROM CHLORIDES

Experimental Apparatus and Procedure.

Experimental Results

Post-Treatment of Produced Composite Powders

6.2. PLASMA-ASSISTED SYNTHESIS

From APT and Co3O4

Synthesis of W-Co Followed by Separate Carburization

Chapter 7 FLAME CHEMICAL VAPOR SYNTHESIS OF SILICA NANOPOWDER

7.1. SYNTHESIS OF SIO2 NANOPARTICLES FROM TEOS

7.2. SYNTHESIS OF SIO NANOPARTICLES USING TMOS PRODUCED FROM SILICON SLUDGE 2

7.3. FLAME VAPOR SYNTHESIS VS. FLAME SPRAY PYROLYSIS

Effect of Precursor Concentration

Effect of Flame Temperature

Particle Formation Mechanisms

Chapter 8 PLASMA-ASSISTED CHEMICAL VAPOR SYNTHESIS OF ZIRCONIA NANOPOWDER

8.1. SYNTHESIS OF YTTRIA-STABILIZED ZIRCONIA NANOPOWDER

8.2 THERMAL STABILITY OF YTTRIA-STABILIZED ZIRCONIA NANOPOWDER

Chapter 9 COMPUTATIONAL FLUID DYNAMIC MODELING OF THE CHEMICAL VAPOR SYNTHESIS PROCESSES

NOMENCLATURE

9.1. INTRODUCTION

9.2. MODEL FORMULATION

Governing Equations

Gas-Phase Reaction Kinetics

Population Balance Model

Kinetics of Particle Nucleation and Growth

Numerical Solution

9.3. SIMULATION OF ALUMINUM NANOPOWDER CVS

9.4. SIMULATION OF SiO24 NANOPOWDER FLAME SYNTHESIS

9.5. SIMULATION OF WC NANOPOWDER CVS

9.6. COMPARISON BETWEEN THE SIMULATION RESULTS OF SIO2 AND WC NANOPARTICLES

CONCLUSION

ACKNOWLEDGMENTS

REFERENCES

INDEX.

Notes:

Description based upon print version of record.

Includes bibliographical references (p. [189]-204) and index.

Description based on print version record; title from PDF title page, viewed (07/10/2020).

ISBN:

1-61470-981-5

OCLC:

923669301