Anhydrous Tungstates Of Group Iv A To Vi B Metals
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Anhydrous Tungstates Of Group Iv A To Vi B Metals
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Author : Dieter Gras
language : en
Publisher: Springer
Release Date : 1984
Anhydrous Tungstates Of Group Iv A To Vi B Metals written by Dieter Gras and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Science categories.
W Tungsten
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Author : Hermann Jehn
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
W Tungsten written by Hermann Jehn and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
W Tungsten
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Author : Gerhard Czack
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
W Tungsten written by Gerhard Czack and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
The volume describes physical properties of tungsten metal and covers specifically surface properties, electron emission, and field evaporation. Tungsten surfaces are probably the most extensively studied metal surfaces. Recently, experimentalists and theorists have focussed their interest on the atomic structure, lattice dynamics, and electronic properties of the W(100) surface. While the structure of the reconstructed low-temperature surface is well established, there are still unresolved problems concerning the structure at and above room temperature, the nature of the phase transition, and the driving force for the reconstruction. There are numerous and partly conflicting data on the surface energy, the self-diffusion parameters, and the work function of single-crystal and polycrystal tungsten surfaces. Electron emission, which is of fundamental importance for many applications, comprises thermionic, field, photofield, and photoelectric emission as well as emission induced by impinging electrons, atoms, or ions. Pioneering work in areas like thermionic or field emission is comprehensively discussed. Very recent studies of valence-band and core-level spectra moreover provide detailed information on intrinsic surface properties.
W Tungsten
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Author : Wolfgang Kurtz
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
W Tungsten written by Wolfgang Kurtz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
The present volume continues the description of the chemical reactions of eiemental tungsten started with "Tungsten" Suppl. Vol. A 7. It covers the reactions with the metallic elements from zinc to actinoids. The treatment includes phase diagrams, bulk reactions, and surface processes which again are of outstanding importance in most systems. The raader is referred to the introductory remarks on pp. X/XI. Frankfurt am Main Ernst Koch November 1987 Introductory Remarks Abbreviations In order not to overload the text, the following abbreviations are sometimes used without definitions in the present volume, in addition to the abbreviations usual in the Gmelin Handbook. a. c. alternating current AE Auger electron Auger electron spectroscopy(ic) or spectrum AES bcc body-centered cubic CPD contact potential difference counts per second cps d. c. direct current DTA differential thermoanalysis Fermi Ievel EF EI electron impact ELS electron energy loss spectroscopy or spectrum EMF, emf electromotive force fcc face-centered cubic FE field emission field electron (emission) microscope(ic) FEM FES field emission spectroscopy FIM field ion microscope(ic) F-N Fowler-Nordheim hcp hexagonal close-packed 6 L Langmuir=1·10- Torr·s LEED low energy electron diffraction monolayer ML PES photoelectron spectroscopy PSD photon-stimulated desorption RHEED reflection high energy electron diffraction room temperature RT SI secondary ion SIMS secondary ion mass spectrometry TDS thermal desorption spectroscopy(ic) or spectrum TE thermionic emission total energy distribution TED UHV ultra-high vacuum UPS ultra-violet photoelectron spectroscopy(ic) or spectrum XPS X-ray photoelectron spectroscopy(ic) or spectrum Gmelin Handbock WSuppl. Vol.
W Tungsten
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Author :
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
W Tungsten written by and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
The present supplement volume, A 7, is the first of a triad, A 5 to A 7, dealing with the chemical reactions of metallic tungsten. It describes the reactions with inorganic and organic compounds, except for formation reactions of organotungsten compounds. Volume A 6, to appear at the beginning of 1988, will cover the reactions of tungsten with metallic elements. Volume A 5, in preparation for 1988/89, will contain the reactions with nonmetallic elements and, in addition, cover the electrochemistry of tungsten. With the appearance of this last volume, the present knowledge of the chemistry of tungsten will be compiled in more than 1000 pages. In the Gmelin main volume on tungsten, published in 1933, the presentation of the information then available on the same subject required less than 6 pages. This enormous increase in relevant data over the last fifty years is stupefying, considering the fact that tungsten is a rather inert metal which is resistant to most chemical agents up to high temperatures.With afew exceptions,in fact, it was not so much the reactions of bulk tungsten which attracted the interest of the experimenters as the reactions taking place at its surface. This comes about for practical as well as scientific reasons.
Gmelin Complete Catalog
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Author :
language : en
Publisher:
Release Date : 1990
Gmelin Complete Catalog written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Chemistry, Inorganic categories.
Metal Chemical Reactions With Metals Antimony To Barium
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Author : Ernst Koch
language : en
Publisher: Springer
Release Date : 1991-09-15
Metal Chemical Reactions With Metals Antimony To Barium written by Ernst Koch and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991-09-15 with Science categories.
The present volume completes the description of the interactions and chemical reactions of elemental tungsten with metallic elements, treating its reactions with antimony, bismuth, and the alkali and alkaline earth metals. The reactions of tungsten with these elements are in most cases confined to surface regions. Corrosion of tungsten and mutual solubility are usually very low. An exception is the W - Be system, in which several intermetallic phases are formed. The surface processes in some of the other systems covered in the present volume evoked considerable scientific and practical interest, documented by the large number of publications. This holds particularly for the Cs-on-W and Ba-on-W surface systems. Cs- and Ba-activated tungsten electrodes were and are used in many technical and laboratory appliances. One example is the Cs diode device for thermionic energy conversion. Surface ionization of Cs and W is widely applied in ion sources and for some time attracted great attention with respect to its potential use in ion rocket propulsion engines. Cs-on-W is also a logical system for basic research on chemisorption due to the propitious chemical, crystallographic, and atomic properties of adsorbent and adsorbate. The majority of existing models for the chemisorption bond has been experimentally checked on this system. The particular interest in the W - Cs and W - Ba systems is reflected in the large portion of the text (256 pages) devoted to these systems.
Tungsten The Element Sect 1 Technology Of The Metal
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Author : Friedrich Benesovsky
language : de
Publisher:
Release Date : 1991
Tungsten The Element Sect 1 Technology Of The Metal written by Friedrich Benesovsky and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Chemistry, Inorganic categories.
Gmelin Handbook Of Inorganic Chemistry
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Author :
language : en
Publisher:
Release Date : 1991
Gmelin Handbook Of Inorganic Chemistry written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Chemistry, Inorganic categories.
Physical Properties Continued
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Author : Elisabeth Koch-Bienemann
language : en
Publisher: Springer
Release Date : 1989
Physical Properties Continued written by Elisabeth Koch-Bienemann and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Science categories.
The present volume continues the edition of a number of supplement volumes dealing with the elements tungsten and molybdenum. Technology and metallurgy of molybdenum and tungsten have been described in the respective volumes A 1. Tungsten Supplement Volume A 2 has been published and comprises the nuclear and atomic properties, sections on the clusters and the vapor, the electronic structure, the lattice dynamics, and the basic crystallographic properties. The present volume A/3 deals with the relationships between lattice defects and mechanical properties. Each of the subsequent chapters, concerning the thermal, electrical, magnetic, and optical properties, has a somewhat larger scope than the corresponding chapter in the Molybdenum Supplement Volumes. Within these chapters, some noteworthy facts are the following: the melting point of tungsten is the highest of all metals, i.e., 3695 K, the behavior of the current carriers has been studied in great detail by numerous methods, and the emissivity characteristics have received much attention above all because of the high melting point. Another special feature is the very intense study of all surface properties and the phenomena, which will be described in a forthcoming volume.