Download or read book The Use of Ammonium Bifluoride in the Preparation of Fluorides from Oxides written by John Reed Long and published by . This book was released on 1948 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparation of Yttrium Fluoride Using Ammonium Bifluoride written by John Walker and published by . This book was released on 1959 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of Uranium Fluorides from Uranium Dioxide with Ammonium Bifluoride and Ammonolysis of Uranium Fluorides to Uranium Nitrides written by Charles Burnett Yeamans and published by . This book was released on 2008 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dry Process Fluorination of Uranium Dioxide Using Ammonium Bifluoride written by Charles Burnett Yeamans and published by . This book was released on 2003 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study was conducted to determine the practicality of various unit operations for fluorination of uranium dioxide. The objective was to prepare ammonium uranium fluoride double salts from uranium dioxide and ammonium bifluoride, then decompose these salts to uranium tetrafluoride through heating to temperatures near 425 °C in either a fluidized bed or a stirred bed. Fluorination in the stirred bed was attempted without pretreatment of the reagents. For the fluidized bed experiments, reagents were ball-milled prior to being heated in the bed. Experiments were conducted in either argon or 4% hydrogen in argon. The ball mill appeared to be an effective technique for fluorinating uranium dioxide with ammonium bifluoride. Samples changed color from brown to bright green, and no oxides could be detected in the x-ray diffraction pattern of the product. It was found that stainless steel is a suitable material of construction for reaction vessels, whereas mild steel parts corroded quickly. Only a small degree of fluidization provided adequate mixing in fluidized beds, but a paddle mixing the stirred beds left an unmixed region around the bed perimeter. Results from the stirred beds showed the initial fluorination reaction completed only when the reagents were heated to 110 °C for at least three hours under argon. Decomposition took place under argon with a temperature ramp up to 425 °C. The product UF4 contained less than 1% oxide as an impurity, and the decomposition appeared to be complete. Fluidized beds were run with both argon and 4% hydrogen in argon as carrier gases. Experiments with 4% hydrogen in argon produced uranium tetrafluoride, with ammonium uranium pentafluoride and uranium dioxide as impurties. Experiments in argon produced uranium tetrafluoride, with uranyl difluoride, ammonium diuranyl pentafluoride and triuranium octoxide as impurities. Minimum temperatures and times needed to decompose the double salt in the fluidized beds were 200 minutes at 115 °C, a 500-minute ramp to 425 °C, and 200 minutes at 425 °C. The intermediate double salt produced at 110 °C appeared to be triammonium uranium septafluoride.
Download or read book Preparation and Metallic Reduction of Rare earth Halides and Oxides written by Thomas T. Campbell and published by . This book was released on 1961 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Defluorination of Fluorspar written by Abner Decker Hahn and published by . This book was released on 1962 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Method for Production of Aluminum Fluoride from Ammonium Fluoride and Ammonium Bifluoride written by W. Augustyn and published by . This book was released on 1955 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of Investigations written by and published by . This book was released on 1959 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extractive Metallurgy of Rare Earths written by Nagaiyar Krishnamurthy and published by CRC Press. This book was released on 2004-12-20 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extractive Metallurgy of Rare Earths compiles information from scattered sources that is often available only to specialists. It provides a complete and usable survey of the rare earth resources, extraction, and production of numerous end products that translates to both laboratory and industrial settings. This book is a source of industry expertis
Download or read book Inorganic Glasses for Photonics written by Animesh Jha and published by John Wiley & Sons. This book was released on 2016-10-17 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced textbook on inorganic glasses suitable for both undergraduates and researchers. Engaging style to facilitate understanding Suitable for senior undergraduates, postgraduates and researchers entering material science, engineering, physics, chemistry, optics and photonics fields Discusses new techniques in optics and photonics including updates on diagnostic techniques Comprehensive and logically structured
Download or read book Factors Influencing the Incendivity of Permissible Explosives written by Robert W. Van Dolah and published by . This book was released on 1961 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glass IV written by Minoru Tomozawa and published by Elsevier. This book was released on 2013-10-22 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Treatise on Materials Science and Technology, Volume 28: Glass IV covers the developments in glass science and technology. The book discusses the use of silicon dioxide films in semiconductor devices; the nuclear waste glasses; and the synthesis and properties of oxynitride glasses. The text also describes the preparation, the properties, and the applications of heavy-metal fluoride glasses; and an analytical model of viscoelasticity in seals. Materials scientists and materials engineers will find the book invaluable.
Download or read book Progress in the Science and Technology of the Rare Earths written by Leroy Eyring and published by Elsevier. This book was released on 2013-09-17 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in the Science and Technology of the Rare Earths, Volume 2 is a collection of papers that details the advancement in various areas of rare earth technology. The coverage of the text includes the practical applications and methods of preparation of rare earth materials. The selection also covers topics about the various properties of rare earths, such as the molecular field model of exchange coupling in rare earth materials; thermodynamic and magnetic properties of the rare earth chalcogenides and pnictides; and structural and solid state chemistry of pure rare earth oxides. The book will be of great use to individuals involved in the research and development of technologies that utilize rare earth materials.
Download or read book Preparation of Yttrium Fluoride in Fluidized Beds written by Irving E. Knudsen and published by . This book was released on 1959 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The batch fluid-bed hydrofluorination of yttrium oxide to yttrium fluoride of low residual oxygen content was studied in a 3-inch Monel column. Bed temperature, hydro-fluorination time, and hydrofluoric acid excess were studied, and the contamination due to equipment corrosion was determined. A sample of the fluoride was converted to metal and analyzed for impurities. A brief investigation of the reaction kinetics was also made on the thermobalance.
Download or read book Actinides in Perspective written by Norman M. Edelstein and published by Elsevier. This book was released on 2013-09-11 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: Actinides in Perspective presents in proceedings of the Actinides-1981 Conference held in Pacific Grove, California, USA on September 10-15, 1981. The book contains papers on the different aspect of the physics and chemistry of the actinides. The text includes papers on the history of the discovery of the transplutonium elements; the photoemission techniques; and the neutron scattering studies of the actinides. The new elements in the transfermium region; the isotope identification in the transfermium region by ?-? correlation after in-flight-separation; and the fission properties of the actinides are also considered. The book further tackles papers on the status of superheavy element research; the single crystal preparation of actinides and actinide compounds; and the preparation of transplutonium metals and compounds, protactinium metal and compounds, and actinide metals. The text also includes papers on the complex oxide systems of the actinides; thermodynamic properties of the actinides; and the chemical and physicochemical properties of actinide organometallic compounds.
Download or read book Molten salt Solvents for Fluoride Volatility Processing of Aluminum matrix Nuclear Fuel Elements written by R. E. Thoma and published by . This book was released on 1964 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fluoride Glass Fiber Optics written by Ishwar D. Aggarwal and published by Academic Press. This book was released on 2013-10-22 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluoride Glass Fiber Optics reviews the fundamental aspects of fluoride glasses. This book is divided into nine chapters. Chapter 1 discusses the wide range of fluoride glasses with an emphasis on fluorozirconate-based compositions. The structure of simple fluoride systems, such as BaF2 binary glass is elaborated in Chapter 2. The third chapter covers the intrinsic transparency of fluoride glasses from the UV to the IR, with particular emphasis on the multiphonon edge and electronic edge. The next three chapters are devoted to ultra-low loss optical fibers, reviewing methods for purifying and analyzing the fluoride glass raw materials. The sources of loss are considered in Chapter 6, while the work performed on the durability of fluoride glasses is analyzed in Chapter 7. Chapter 8 focuses on the effects of radiation on fluoride glasses. The last chapter deliberates the area of active phenomena such as doping of fluoride glasses with rare-earth elements for fluorescence and lasing, as well as frequency doubling. This publication is a good reference for students and researchers conducting work on fluoride glasses.
