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Monday, November 9, 2020 | History

2 edition of Preliminary study of a radiantly heated fluidized bed for the production of high-purity silicon found in the catalog.

Preliminary study of a radiantly heated fluidized bed for the production of high-purity silicon

Preliminary study of a radiantly heated fluidized bed for the production of high-purity silicon

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Published by The Laboratory in Pasadena, CA .
Written in English

    Subjects:
  • Fluidization.,
  • Silicon.

  • Edition Notes

    Statementby Octave Levenspiel ... [et al.] ; prepared for Jet Propulsion Laboratory, California Institute of Technology.
    SeriesNASA-CR -- 173758., NASA contractor report -- NASA CR-173758.
    ContributionsLevenspiel, Octave., Jet Propulsion Laboratory (U.S.), Oregon State University.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17831634M


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Preliminary study of a radiantly heated fluidized bed for the production of high-purity silicon Download PDF EPUB FB2

Get this from a library. Preliminary study of a radiantly heated fluidized bed for the production of high-purity silicon. [Octave Levenspiel; Jet Propulsion Laboratory (U.S.); Oregon State University.;]. Preliminary study of a radiantly heated fluidized bed for the production of high purity silicon eBook: National Aeronautics and Space Administration NASA: : Kindle StoreAuthor: National Aeronautics and Space Administration NASA.

Journal Article: Silicon Chemical Vapor Deposition on macro and submicron powders in a fluidized bed. Midland-Ross's invention improves the circulation of heat in radiant heat-treating furnaces without resorting to the use of fans or other devices that cannot withstand high temperatures.

Nozzles positioned diagonally across from each other blow high-velocity streams of hot gas into the furnace. This book is an excellent introduction to real-world applications for advanced undergraduates and an indispensable reference for professionals. The book includes comprehensive chapters on the different types and classifications of fluids, how to analyze fluids, and where a.

The aim of this work was to predict energy equilibrium values in a bench-scale fluidized bed (FB: × mm), using a thermal breakthrough analysis (TBA). Stanford Libraries' official online search tool for books, media, journals, databases, government documents and more.

Melting silicon is accumulated in the hearth and pulled out from the tapping hole. The productivity has been about 2 kg/h and the silicon yield has been found to be typically 83%. Analyses have shown that the impurities in the silicon were below ppmw for B, 12 ppmw for Cited by: 3.

Production of High Purity Silicon by Carbothermic Reduction of Silica Using AC-arc Furnace with Heated Shaft. Tranell, S. Gaal, et al. Study of Pellets and Lumps as Raw Materials in Silicon Production from Quartz and Silicon Carbide.

Metallurgical and Materials Cited by: Preliminary study of a radiantly heated fluidized bed for the production of high purity silicon (English Edition) eBook: National Aeronautics and Space Administration NASA: : Kindle-ShopFormat: Kindle.

Achetez et téléchargez ebook Preliminary study of a radiantly heated fluidized bed for the production of high purity silicon (English Edition): Boutique Kindle - Science: at: Format Kindle. High-purity silicon is obtained using a three-step process.

the first step involves heating solid silicon dioxide, sio2, with solid carbon to give solid silicon and carbon monoxide gas.

in the second step, solid silicon is converted into liquid silicon tetrachloride, sicl4, by treating it with chlorine gas. in the last step, sicl4 is treated with hydrogen gas to give ultrapure solid silicon. Full text of "NASA Technical Reports Server (NTRS) Proceedings of the 21st Project Integration Meeting" See other formats.

This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Reference: TP-GB-RE-LAF Page: 1/11 8 rue des Graviers – Neuilly sur Seine Cedex ferrosilicon, silicon or the zirconium production can vary from one lot to another and significantly from one product to the next.

The most typical soluble species in fume. The total integrated zone below the thermogram peak area on DSC curves is a function of the change in enthalpy changes are related to the volume of precipitation of secondary phases and values of total enthalpy on exothermal peaks are presented in Table the aging temperature increased from °C to °C, the enthalpy achieved from the peak of DSC curve was by: 5.

The (a/nc-) AlN films were prepared by reactive rf-sputtering using a high purity (5 N) aluminium disk in high purity nitrogen atmosphere (5 N, pressure ca. mbar). Thin film heaters made of Ca-doped lanthanum chromite (LaCrO3) are fabricated by means of RF magnetron sputtering.

Thin films of Ca-doped LaCrO3 show different heating characteristics under dc current drive for different purities of alumina substrate. In the case of a low purity (%), LaCrO3 thin film heaters showed an increase of resistance with by: 2.

Physics Procedia 25 () – © Published by Elsevier B.V. Selection and/or peer-review under responsibility of Garry Lee doi: / *Corresponding author: Tel: +44Fax: +44 E mail address: [email protected].uk International Conference on Solid State Devices and Materials Science Thickness Cited by: Results of a preliminary study are presented on the combustion of CO/air in a Pt/Al/Cordierite honeycomb catalyst.

The test conditions were: inlet temperature, ± 8 K; inlet pressure, ± 4 kPa; reference velocity, m/s; CO/air equivalence ratio, - ; and t^O concentration, - mol%. A review paper on induction furnace 1. Vivek R. Gandhewar et al. / International Journal of Engineering and Technology Vol.3 (4),Induction Furnace - A Review Vivek R.

Gandhewar1*, Satish V. Bansod2, Atul 3 1,3 Mechanical Engineering Department, Jawaharlal Darda Inst. of Engg. A process may include providing heat from one or more heaters to at least a portion of a subsurface formation.

Heat may transfer from one or more heaters to a part of a formation. The approach of Dr. C.K. Gupta and Dr. Sathiyamoorthy of the Bhabha Atomic Research Centre is to painstakingly bring together the wealth of information in this field and to present it concisely in a book on fluid bed technology in materials processing.

The aim and scope of this volume as indicated by the title are well achieved. 11) Callister, D5 An integrated circuit design calls for diffusing boron from the surroundings into very high purity silicon at a constant elevated temperature. During the diffusion treatment, the concentration of B at the surface of the Si will be maintained at a constant level of m3.

More recently, Barile et al. () have reported on the performance of a "turbulent bed cooling tower" employing a fluidized bed of hollow spheres. Spray Columns Spray chambers are convenient for direct-contact heat transfer operations and are simple in design, containing as internals only one or more banks of spray : Harsha Nagesh.

Fluidized bed heat exchanger utilizing angularly extending heat exchange tubes. DOEpatents. Talmud, Fred M.; Garcia-Mallol, Juan-Antonio. A fluidized bed heat exchange. Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics.

Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics. Studylib. Documents Flashcards Grammar checker Login Upload document Annual Report Research Activities   Energy transfer simulation for radiantly heated and cooled enclosures.

SciTech Connect. Chapman, K.S.; Zhang, P. This paper presents the development of a three-dimensi. Desulfurized producer gas and, for example, oxidized iron solids such as a mixture of Fe 2 O 3, Fe 3 O 4, and FeO are contacted in a fast fluidized bed or entrained solid lift pipe type reactor 2 at temperatures from about °° C.

and at pressures of atm, preferaby about atm. Choice of temperature and pressure are dependent on. It was found that a high production capacity of approximately 2 ton-Si/ year was pos sible under continuous operation using a tube reactor of only 30 mm in diameter.

Grain growth control of silicon was also examined successfully. Refinement of the process conditions and improvement of the purity of silicon are the future Size: KB.

EPA/ April MUNICIPAL WATER POLLUTION CONTROL ABSTRACTS FOR By Joanne S. Murphy Grant No. R Program Element 1BB Roap/Task PEMP 08 Project Officer Patrick M. Tobin Municipal Pollution Control Division Control and Treatment Integration Branch Environmental Protection Agency Washington, D.C.

Prepared for Office of Research. The composite reinforcements are continuously pulled through a heated die and shaped and cured simultaneously. If the cross-sectional shape is conducive to the process, it is p f r 4 the fastest and most economical method of Fig. The helical filament wound ply.

(Courtesy composite production.5/5(5). The purpose of this chapter is to provide a survey and overview of the results and findings of case studies of moisture problems in buildings.

By case studies is meant any field study or pertinent and realistic laboratory study dealing with some aspect of actual moisture problems in buildings. Moisture modeling studies are not included. The material to be deposited emerges and expands into a vacuum environment from a small nozzle of a heated confinement crucible, usually constructed of high-purity graphite.

The vapor pressure within the crucible is several orders of magnitude higher than the pressure of the vacuum chamber so that the expanding vapor supercools.