Download or read book Ionic Diffusion in Oxide Glasses written by G.H. Frischat and published by Trans Tech Publications Ltd. This book was released on 1985-01-01 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oxygen Ion Diffusion in Oxide Glasses written by Jacques Antoine Lecron and published by . This book was released on 1959 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Structural Basis for Ionic Diffusion in Oxide Glasses written by G. N. Greaves and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diffusion of Oxygen in Magnesium Oxide written by Lee Henry Rovner and published by . This book was released on 1966 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusion of oxygen in magnesium oxide is measured in the temperature range 750-1150C at 1 torr oxygen pressure. The measurements utilized an oxygen-18 isotopic exchange technique to measure diffusion coefficients as small as 10 to the minus 20th power sq cm/sec. Interference from diffusion down enhanced diffusivity channels is observed. Both intrinsic and extrinsic lattice diffusion is observed. In the intrinsic region the activation energy, Q, is 82.1 plus or minus 3 kcal/mole and D varies as P(02) to the 0.22 plus or minus 0.1 power sq cm/sec. For extrinsic diffusion Q = 30. 2 plus or minus 3 kcal/mole. This same activation energy is found in a crystal doped with chromium: Q = 34.0 plus or minus 4 kcal/mole. Also, D varies as P(02) to the 0.48 plus or minus 0.05 power. These data are compatible with an interstitial oxygen mechanism for both crystals. In a lithium-doped crystal, Q = 42.6 plus or minus 4 kcal/mole and D varies as P(02) to the minus 0.7 plus or minus 0.25 power sq cm/sec. This is consistent with an oxygen vacancy mechanism. Under conditions appropriate for intrinsic diffusion, magnesium oxide is shown to be an oxygen excess structure. Charge compensation is by formation of trapped-hole defects. In lithium-doped material, trapped-electron defects are present. These defect species are important to the electrical conductivity properties of magnesium oxide. (Author).

Download or read book To Clarify the Air Inclusions Influence on Oxygen Evolution Diffusion Or Absorption in Glasses at High Temperature written by Rasheed Ali Zaidi and published by . This book was released on 1959 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single component and Binary Non silicate Oxide Glasses written by Oleg Vsevolodovich Mazurin and published by Elsevier Publishing Company. This book was released on 1985 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, the second of a five-part comprehensive reference work on the properties of one-component, binary and ternary oxide glass-forming melts and glasses, covers single-component and binary non-silicate oxide glasses. The main body of the book contains the most important and dependable numerical and graphical data on the following properties: glass formation, crystallization, density, thermal expansion, and other thermal properties, optical properties, viscosity, elastic properties and internal friction, strength, surface tension, chemical durability, electrical properties, diffusion, permeation and solubility of gases, ion diffusion, volatilization, magnetic properties. Extensive references are included, as are subject and formula indexes.

Download or read book Multiple Diffusion Process in Oxide Glasses written by Hiroshi Namikawa and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Role of Structure in Ionic Conduction in Oxide Glasses written by Wei-Chi Huang and published by . This book was released on 1996 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemistry of Glasses written by A. Paul and published by Springer Science & Business Media. This book was released on 1989-11-30 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of glass is a rapidly developing field brought about by the merging together of advanced chemistry and advanced physics. While acting as a text book on the subject, this work may also serve as a useful reference source for students and research workers alike.

Download or read book Current Trends In The Science And Technology Of Glass Proceedings Of The Indo us Workshop written by Himanshu Jain and published by World Scientific. This book was released on 1989-09-01 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:Glass Surfaces (C Pantano)Current Thoughts on Crystal Nucleation and Growth in Viscous Liquids (D Turnbull)Design of Glass-Ceramics (G Beall)Dynamic Ions in Oxide Glasses (H Jain)Black Box(es) Analysis of Glass Melting Furnaces (A R Cooper)Some Recent Studies of Structure and Modelling in Glasses (K J Rao)Ion-Exchange Processing of Glasses (D Chakravorty)Nonlinear Structural Relaxation in Glassy Systems: An Interpretation of the Narayanaswamy Model (B Bagchi)Crystallisation of Metallic Glasses (P R Rao)Fast Ion Conduction in Glasses: The New Solid Electrolytes (C A Angell)Strength and Fatigue of Oxide Glasses (C R Kurkjian)Models of the Glass Transitions (P K Gupta)Colloidal Glasses (A K Sood)Glass in New Electro-Optic Devices (E Snitzer)Optical Coatings on Glass by Sol-Gel Processing: Achievements and Future Tasks (D Ganguli)Oxidation-Reduction Equilibrium During Preform Making of Optical Fibre (A Paul)Application of Finite Element Analysis to Glass Processing (A K Varshneya)Double Glass Transition and Double Stage Crystallization in Te Based Chalcogenide Glasses (S Ashokan & E S R Gopal)Heat Release and Calorimetry Near Glass Transition (A K Raychaudhuri & M Rajeswan)Heavy Metal Fluoride Glasses (C T Moynihan) Readership: Materials scientists and condensed matter physicists.

Download or read book Absorption Spectra of Transition Metal Ions in Glasses as Functions of Oxygen Pressure Temperature and Composition written by Ick-jhin Yoon and published by . This book was released on 1977 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct Methods of Observing Non standard Oxygen Species in Oxide Glasses and Crystals written by Michelle Marie LaComb and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Glasses are amorphous solids that lack long-range order but contain short-range order with varying degrees of polymerization. This short-range order is comprised of varying oxygen species made from a combination of oxygen and one or more network-forming cations, which bond strongly to oxygen, and network-modifying cations, which bond weakly. This thesis focuses on four oxygen species in particular, non-bridging oxygens (NBO) which are oxygen anions shared between one network-former and one or more network-modifiers, bridging oxygens (BO), which are oxygen anions shared between two network-formers, tricluster oxygens, which are oxygen anions shared between three tetrahedral network-formers, and free oxide ions (FO) which are oxygen anions with exclusively network-modifiers as neighbors. 17O NMR can be used to directly view and measure the ratios of these various species, which can yield information about glass structure and properties. This work explores how oxygen-17 NMR can be used as a tool to probe oxide glass structure across a variety of compositions. A variety of oxide glasses were synthesized and enriched in 17O, including glasses containing various combinations of Al, B, and Si, which have diverse industrial applications. The goal of this work was to study species of oxygen that are rarely found within many compositions of oxide glasses, which was accomplished, in part, through the implementation of new double resonance NMR techniques involving decoupling of quadrupolar nuclides. Chapters 2 and 3 aimed to study relative proportions of NBO and BO in glass structures, focusing particularly on isolating the presence of the rare, but important, Al-NBO species. In Chapter 2, the TRAPDOR technique was introduced and first implemented with the dephasing of oxygen connected to either 27Al or 11B from observed 17O spectra in a variety of calcium aluminosilicate and aluminoborosilicate glasses. Chapter 3 continues and expands this research to calcium aluminoborate, aluminosilicate and aluminoborosilicate glasses, and barium aluminoborosilicate glasses, and quantifies the effect of a number of experimental variables in the design of complex TRAPDOR NMR experiments. Chapter 4 looks at tricluster oxygens in crystalline and glassy strontium tetraborate through 17O MQMAS, looking at differences in structure between the crystal and equivalent glass. Appendix XI looks at FO in crystals and low-silica Mg-rich glasses with 17O-> 29Si HETCOR NMR.

Download or read book Progress in Ion Transport and Structure of Ion Conducting Compounds and Glasses written by Helmut Mehrer and published by Trans Tech Publications Ltd. This book was released on 2016-02-18 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid electrolytes are important components of for all-solid-state devices of energy storage and conversion. A prerequisite for such applications is a knowledge about ion transport in the device materials. The present volume contains a series of five chapters by experienced authors from the field of diffusion and ionic conduction. The chapters are devoted to various aspects of ion transport in. compounds and glasses studied by theoretical and experimental methods.

Download or read book Calculation of Ionic Conductivity Activation Energies in Ionic Oxide Glasses from Spectroscopic Data written by Gregory J. Exarhos and published by . This book was released on 1975 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activation energies for ionic conduction in inorganic oxide glasses are related to cation-motion vibrational band frequencies obtained from the far-infrared spectra of the glasses. The pseudo free ion approach is considered and a closely related formalism developed using vibrational energetics for the ion and its site, is employed. It leads to good correspondence between calculated and observed quantities and to the origin of the relationship of the ion motion distance to the 'critical' vibrational amplitude. Comparisons of the calculated and observed quantities are presented for M2O-P2O5 glasses, M = Li(+), Na(+), Rb(+), Ag(+), and for a number of vitreous M2O-xSiO2 systems.

Download or read book FIVE RECENT PAPERS EALING WITH THE STRUCTURE OF GLASS written by Rajeshwar K. Gupta and published by . This book was released on 1956 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Glass Science written by R. H. Doremus and published by Wiley-Interscience. This book was released on 1973 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition retains its pedagogical structure but has been extensively revised and updated. Features advances in the field pertaining to the latest developments on fatigue and fracture as well as environmental aspects of some hazardous materials and their effects on glass during long term storage. Contains a new description of the oxidation state of glass and its components based on the phase rule. Includes a new chapter on chemical durability with recent information regarding corrosion of glass and radioactive waste disposal.

Download or read book Metallic Glasses and Their Oxidation written by Xinyun Wang and published by Elsevier. This book was released on 2022-11-03 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic Glasses and Their Oxidation provides a comprehensive review of the structures, properties, preparations, processing and applications of metallic glasses. Special attention is paid to the oxidation behaviors and related mechanisms of metallic glasses that occur during their preparation, processing and application. The book's authors introduce basic knowledge of metallic glasses, including their structures, properties, processing techniques and applications. Then, the theories and techniques commonly used in oxidation investigation are highlighted, including thermal oxidation, native oxidation, stressed oxidation, powder oxidation and oxidation simulation. The book closes with the influence of oxidation on the structures and performances of metallic glasses, proposes measures to control oxidation, and discusses how to take advantage of oxidation to reinforce materials or create new materials. Introduces the latest knowledge on the structures, properties, preparation, processing and application of metallic glasses Reviews the fundamental concepts surrounding metal oxidation, including techniques, devices and methods frequently used in oxidation research Discusses measures to control oxidation and the possibilities of using oxidation to reinforce metallic glasses or create new types of materials