Download or read book Synthesis of Ultrafine Beta silicon Carbide Powders in Thermal Plasmas written by Peter Chuen-Sun Kong and published by . This book was released on 1985 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rf Plasma Synthesis of Ultrafine Ultrapure Silicon Carbide Powder written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafine, ultrapure silicon carbide powder has been produced by reaction of silane and methane in a high temperature rf plasma. Preliminary studies include the effect of gas composition and of powder (plasma temperature) on the stoichiometry of the powder. The carbon-to-silicon ratio of the powder was varied from 1.0 to 1.9 by changing the process conditions. The powder has a BET surface area of 101 m2/g, which is equivalent to a particle diameter of 18.5 nm. A particle size in the range of 10 to 20 nm was measured by transmission electron microscopy. X-ray diffraction results indicate a domain size of 7.5 nm and a crystal structure of beta (cubic) silicon carbide. Spectrographic analysis shows that metallic impurities are lower than high quality grade commercial powder. Because of the high surface area, the powder must be stored and processed in an inert atmosphere to prevent severe contamination with oxygen.
Download or read book Synthesis of Ultrafine Ceramic and Metallic Powders in a Thermal Argon Rf Plasma written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafine powders of SiC, Si3N4, Ni, and Al2O3 have been prepared in a rf-plasma reactor, utilizing an induction plasma tube designed at Los Alamos. The primary particle size of the ceramic powders ranges from 5 to 50 nm. Silicon carbide and alumina are ultrapure crystalline powders, while silicon nitride is amorphous for surface areas greater than 100 m2/g. Plasma nickel powder will sinter to full density at 1073 K.
Download or read book Plasma Synthesis of Ultrafine Silicon Carbide Powders written by and published by . This book was released on 1990 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feasibility study for the plasma synthesis of high purity ultrafine powders of silicon carbide, with special attention given to raw material and energy cost in the selection of the reaction route and the reactor design used. Priority was given to the possible use of relatively low-cost raw materials such as silica or elemental silicon as starting material in favour of more expensive traditional feedstocks such as silane or silicon tetrachloride used by earlier investigations in this field. The proposed approach is based on the direct carburization of silicon vapour/condensed droplets using methane as quench gas.
Download or read book Carbide Nitride and Boride Materials Synthesis and Processing written by A.W. Weimer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 675 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader. The subject matter ranges from materials properties and applications to methods of synthesis including pre- and post-synthesis processing. Although most of the text is concerned with the synthesis of powders, chapters are included for other materials such as whiskers, platelets, fibres and coatings. Carbide, Nitride and Boride Materials Synthesis and Processing is a comprehensive overview of the subject and is suitable for practitioners in the industry as well as those looking for an introduction to the field. It will be of interest to chemical, mechanical and ceramic engineers, materials scientists and chemists in both university and industrial environments working on or with refractory carbides, nitrides and borides.
Download or read book Thermal Plasma Processing of Fine Powders written by Robert Miles Young and published by . This book was released on 1987 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ceramic Powder Preparation A Handbook written by Dibyendu Ganguli and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: 3. 1 Techniques of Comminution 35 3. 2 Solid-Solid Reactions 42 3. 2. 1 Mixing and Calcination 42 3. 2. 2 Modem Techniques 45 3. 3 Solution Techniques 46 3. 3. 1 Precipitation and Co-precipitation 46 Forced Hydrolysis 3. 3. 2 49 3. 3. 3 Hydrotbennal Synthesis 51 The Sol-Gel Process 3. 3. 4 53 3. 3. 5 Hydrolysis of Metal-Organics 56 The Emulsion Process 3. 3. 6 56 Solvent Vaporization 3. 4 59 3. 4. 1 Simple Evaporation 59 3. 4. 2 Spray Drying 60 3. 4. 3 Spray Pyrolysis 64 3. 4. 4 Freeze Drying 66 3. 5 Vapour-Phase Techniques 68 3. 5. 1 Vaporization-Condensation 68 3. 5. 2 Vapour-Vapour Reaction 68 3. 5. 3 Vapour-Liquid Reaction 70 3. 5. 4 Vapour-Solid Reaction 71 3. 6 Precursor Decomposition 72 3. 6. 1 Salt Decomposition 72 3. 6. 2 Polymer Pyrolysis 73 4. Synthetic Powders : Options in Preparation 75 4. 0 Introduction 75 4. 1 Single and Multiple Oxide Powders 75 4. 1. 1 Aluminium Oxide 75 4. 1. 2 Zirconium Oxide 85 4. 1. 3 Titanium Oxide 96 4. 1. 4 Magnesium Oxide 99 4. 1. 5 Silicon Dioxide 101 4. 1. 6 Rare Earth Oxides 105 Yttrium Oxide 105 Cerium Oxide 106 4. 1. 7 Zinc Oxide 107 [vi] 4. 1. 8 Mullite 110 4. 1. 9 Magnesium Aluminate Spinel 114 4. 1.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1985 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Plasma Applications in Materials and Metallurgical Processing written by N. El-Kaddah and published by Minerals, Metals, & Materials Society. This book was released on 1992 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews and presents current research for investigators, users and potential users of thermal plasma technology. A broad range of applications are discussed, including melting and refining, extractive metallurgy, plasma spraying, composite materials processing, and plasma synthesis of materials.
Download or read book Nanomaterial Volume 4 written by Jyotsna Chauhan and published by Educreation Publishing. This book was released on with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are four volume of this book series, nanomaterial vol 1,2,3,4. The whole series covers the whole syllabus of MTech nanotechnology(RGPV). The main purpose of these books are to provide the complete syllabus of PG students at one place at very low cost.
Download or read book Production of Ultra Fine Silicon Carbide By Fast Firing in Microwave and Resistance Furnaces written by S. N. Kumar and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-fine SiC powder has been synthesized by the carbothermal reduction of silica by microwave and conventional firing techniques. Analysis of these powders by transmission electron microscopy, Auger electron spectroscopy and X-ray diffraction has shown the formation of Beta-SiC. The crystallite size of Beta-SiC produced by the microwave and conventional firing techniques range from 30-200 nm and 50-450 rim respectively. The product obtained from conventional firing also revealed stacking faults over a number of crystallites.
Download or read book Production and Processing of Fine Particles written by A. J. Plumpton and published by Elsevier. This book was released on 2017-05-04 with total page 929 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of an international symposium organised by the Metallurgical Society of the Canadian Institute of Mining and Metallurgy. The aims of the symposium were to discuss fundamental and practical aspects of the technology for the production of fine inorganic particles for the metals, industrial minerals and advanced ceramics sectors, to highlight particle characterization methods and developments, and to review major advances in the processing and extractive metallurgy of finely-sized minerals. 96 conference papers by authors from 19 countries addressed such topics as particle morphology and size analysis, physical and chemical methods for producing fine particles, processing of minerals using gravity, magnetic and electrostatic separation, flotation and flocculation, phase separation involving fine particles, and the hydrometallurgy and pyroprocessing of fine particles. This book will be of interest to mineral processing scientists and engineers, ceramicists, extractive metallurgists and chemical engineers, who are faced with the increasing significance of inorganic fine particles either as valuable products or as materials to be treated in mineral processing systems.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1986 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of Ultrafine SiC Powders by Laser driven Gas Phase Reactions written by Y. Suyama and published by . This book was released on 1982 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallurgical Processes for the Early Twenty first Century written by Hong Yong Sohn and published by Minerals, Metals, & Materials Society. This book was released on 1994 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume collection of 145 international papers examines and discusses the predicted principal features of future metallurgical plants and technologies, the effects of new developments on existing processes, and the future directions of research and education. Discussion topics include: value-addition metallurgy; metals processing; new end emerging technologies; recycling, waste treatment and environmental issues; ironmaking and steelmaking; process modeling; aqueous processing; and plant modernization.
