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Investigation Of Porous Glasses Based On Sodium Borosilicate Glass System
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Book Synopsis Investigation of Porous Glasses Based on Sodium-borosilicate Glass System by : Muhammad Hasanuzzaman
Download or read book Investigation of Porous Glasses Based on Sodium-borosilicate Glass System written by Muhammad Hasanuzzaman and published by . This book was released on 2013 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work investigated the development of porous glasses by making additions of zirconia (ZrO2) and zircon (ZrSiO4) to the sodium borosilicate glass system SiO2-B2O3-Na2O. Additions of Zr-based compounds were made in an attempt to yield more alkaline durable porous glasses compared to the silica-rich porous glass structures of the parent sodium borosilicate glass system. Glasses were fabricated using a high-temperature fusion process. X-ray diffraction (XRD) was used to confirm that the glasses were amorphous upon pouring from the melt. The glasses were characterised using differential thermal analysis (DTA) to identify important thermal events, including the glass transition temperature (Tg) and crystallisation temperature (Tx). The occurrence of amorphous phase separation was key to the formation of two-phase glasses and ultimately porous glasses. It was found that the quantity of sodium oxide (Na2O) in the glass composition played an important role in determining whether phase separation occurred via nucleation and growth or spinodal decomposition. Based on the DTA data, a heat treatment temperature of 650 °C was selected for three different durations (14, 24 and 63 hours). The heat-treatment caused the glasses to phase separate into two phases; a silica-rich phase and a sodium borate phase. The sodium borate phase coarsened as a function of heat-treatment time. Fourier transform infrared (FTIR) spectroscopy, together with XRD, was found to be effective as a means of comparing the phase separation and crystallisation characteristics. Glasses heat-treated for longer times showed some evidence of crystal formation. Having formed two-phase glass, acid leaching was used to remove the borate phase and create a porous structure. The leaching process had to be carefully controlled in terms of acid type, acid concentration, leaching time and leaching temperature. For all glasses, a post-leach alkali wash step was needed to remove trapped silica gel. The porous glasses comprised a silica-rich porous skeleton. Scanning electron microscopy (SEM) revealed classic interconnected porous morphologies. The most consistent and best-defined morphologies were observed for the zircon-containing glass. Energy dispersive X-ray (EDX) analysis confirmed the presence of zirconium (Zr) in the porous silica-rich skeleton. Mercury intrusion porosimetry (MIP) was used to characterise the pore characteristics and measure pore volume, pore size, pore distribution, total pore surface area, and bulk and apparent density. In general, the porous glasses exhibited sharp, unimodal pore distributions, but there was also evidence of micropores, believed due to residual silica gel. Mean pore size ranged from 40 nm to 200 nm for the different porous glasses studied. It was observed that mean pore size linearly increased with square root of the heat-treatment time. Total pore surface area increased with decreasing size of pores and ranged from 5 to 35 m2/g depending on glass composition and heat-treatment time. Alkaline resistance tests were carried out. Zircon- and zirconia-containing porous glasses are 3-4 times more alkali durable than the parent sodium borosilicate glass.
Book Synopsis Advances in Bioceramics and Porous Ceramics VI, Volume 34, Issue 6 by : Roger Narayan
Download or read book Advances in Bioceramics and Porous Ceramics VI, Volume 34, Issue 6 written by Roger Narayan and published by John Wiley & Sons. This book was released on 2013-12-02 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic Engineering and Science Proceedings Volume 34, Issue 6 - Advances in Bioceramics and Porous Ceramics VI A collection of 13 papers from The American Ceramic Society's 37th International Conference on Advanced Ceramics and Composites, held in Daytona Beach, Florida, January 27-February 1, 2013. This issue includes papers presented in Symposium 5 - Next Generation Bioceramics and Biocomposites and Symposium 9 - Porous Ceramics: Novel Developments and Applications.
Book Synopsis 29Si MAS-NMR Study of the Short Range in Sodium Borosilicate Glasses and an Investigation Into the Preparation and Glass Transition Temperatures of Alkali Vanadate Glasses by : Gaurav Bhasin
Download or read book 29Si MAS-NMR Study of the Short Range in Sodium Borosilicate Glasses and an Investigation Into the Preparation and Glass Transition Temperatures of Alkali Vanadate Glasses written by Gaurav Bhasin and published by . This book was released on 1996 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phase-Separation Phenomena in Glasses / Likvatsionnye Yavleniya v Steklakh / Ликвационные Явления в Стеклах by : E. A. Porai-Koshits
Download or read book Phase-Separation Phenomena in Glasses / Likvatsionnye Yavleniya v Steklakh / Ликвационные Явления в Стеклах written by E. A. Porai-Koshits and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First All-Union Symposium on Phase-Separation Phenomena in Glasses was held in Lenin grad from April 16 to 18, 1968. The symposium was organized by the Section of the structure of glass and the nature of the glassy state of the Scientific Council for the problem "New Tech nical Materials and Coatings Based on Glass and Refractory Compounds" of the State Committee for Science and Technology of the Council of Ministers of the USSR, by the Scientific Council for the problem "Physicochemical Principles of Production of New Heat-Resistant Inorganic Mate rials" of the Division of Physical Chemistry and Technology of Inorganic Materials, Academy of Sciences of the USSR, by the Leningrad regional board of the D. 1. Mendeleev All-Union Chemi cal Society, and by the 1. V. Grebenshchikov Institute of Silicate Chemistry, Academy of Sciences of the USSR. The present collection consists of the Proceedings of the Symposium and is No. 3 in Vol. 5 of the series "The Glassy State," published by the Academy of Sciences of the USSR since 1955. The book contains the results of theoretical and experimental investigations of phase sep aration of glasses into two glassy phases, and of the influence of this submicroscopically heter ogeneous structure on certain properties of glass. Metastable phase separation in glasses was discovered about 10 years ago.
Download or read book Borate Glasses written by L. D. Pye and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boron Oxide plays a key role in numerous glasses of high technological importance, yet its role in glass structure is far from clear. Indeed, in recent years there have been serious chal lenges to previous structure concepts for both crystalline and glassy borates. These challenges were sufficient to warrant a re examination of the structure of borate glasses using the most pow erful tools currently available. To provide a suitable forum for this undertaking, a four-day conference on "Boron in Glass and Glass Ceramics" was convened at Alfred University, June 3-8, 1977 to review the best scientific thinking on structure and to debate conflicting views and discuss properties and applications of borate glasses. This conference was also the first in a New University series on Glass Science to be rotated among Alfred University, The Pensyl vania State University, Rensselaer Polytechnic Institute, and the University of Missouri-Rolla. The present volume represents the proceedings of the first conference in this series. The volume begins with a review of the remarkable contribution of Jan Krogh-Moe to the understanding of the structure of Borate glasses. This review, authored by Professor N. J. Kreidl, concludes by dedicating the proceedings of this conference as a Krogh-Moe Fest schrift. The volume continues with a historical review by D. L. Griscom, originally prepared for circulation to the contributors prior to the conference. An Epilogue to the opening chapter brings the survey up-to-date in light of the conference papers.
Book Synopsis OTS. by : United States. Dept. of Commerce. Office of Technical Services
Download or read book OTS. written by United States. Dept. of Commerce. Office of Technical Services and published by . This book was released on 1963 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to Glass Science and Technology by : James E Shelby
Download or read book Introduction to Glass Science and Technology written by James E Shelby and published by Royal Society of Chemistry. This book was released on 2015-11-06 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a concise and inexpensive introduction for an undergraduate course in glass science and technology. The level of the book has deliberately been maintained at the introductory level to avoid confusion of the student by inclusion of more advanced material, and is unique in that its text is limited to the amount suitable for a one term course for students in materials science, ceramics or inorganic chemistry. The contents cover the fundamental topics of importance in glass science and technology, including glass formation, crystallization, phase separation and structure of glasses. Additional chapters discuss the most important properties of glasses, including discussion of physical, optical, electrical, chemical and mechanical properties. A final chapter provides an introduction to a number of methods used to form technical glasses, including glass sheet, bottles, insulation fibre, optical fibres and other common commercial products. In addition, the book contains discussion of the effects of phase separation and crystallization on the properties of glasses, which is neglected in other texts. Although intended primarily as a textbook, Introduction to Glass Science and Technology will also be invaluable to the engineer or scientist who desires more knowledge regarding the formation, properties and production of glass.
Book Synopsis Phase Separation in Glass by : Oleg Vsevolodovich Mazurin
Download or read book Phase Separation in Glass written by Oleg Vsevolodovich Mazurin and published by North Holland. This book was released on 1984 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase Separation in Glass.
Book Synopsis Physics and Chemistry of Glasses by :
Download or read book Physics and Chemistry of Glasses written by and published by . This book was released on 2005 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Porous Glasses for Large-scale Protein Purification by : David Greene
Download or read book An Investigation of Porous Glasses for Large-scale Protein Purification written by David Greene and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Practical Guide to Gas Analysis by Gas Chromatography by : John Swinley
Download or read book A Practical Guide to Gas Analysis by Gas Chromatography written by John Swinley and published by Elsevier. This book was released on 2019-06-28 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Practical Gas Analysis by Gas Chromatography provides a detailed overview of the most important aspects of gas analysis by gas chromatography (GC) for both the novice and expert. Authors John Swinley and Piet de Coning provide the necessary information on the selection of columns and components, thus allowing the reader to assemble custom gas analysis systems for specific needs. The book brings together a wide range of disparate literature on this technique that will fill a crucial gap for those who perform different types of research, including lab operators, separation scientists, graduate students and academic researchers. This highly practical, up-to-date reference can be consulted in the lab to guide key decisions about proper setup, hardware and software selection, calibration, analysis, and more, allowing researchers to avoid the common pitfalls caused by incorrect infrastructure. - Shows, in detail, how valve configurations work, allowing readers to understand the building blocks of extremely complex systems - Presents the complete infrastructure for setting up a gas analysis laboratory in a single source - Includes a full chapter on practical analytical systems for analyzing various gas mixtures
Book Synopsis Preparative Chromatography by : H. Schmidt-Traub
Download or read book Preparative Chromatography written by H. Schmidt-Traub and published by John Wiley & Sons. This book was released on 2020-02-27 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third edition of this popular work is revised to include the latest developments in this fast-changing field. Its interdisciplinary approach elegantly combines the chemistry and engineering to explore the fundamentals and optimization processes involved.
Book Synopsis Phase Separation in Glass by : Oleg Vsevolodovich Mazurin
Download or read book Phase Separation in Glass written by Oleg Vsevolodovich Mazurin and published by North Holland. This book was released on 1984 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase Separation in Glass.
Book Synopsis Yucca Mountain Site Characterization Project Bibliography, 1992-1993 by :
Download or read book Yucca Mountain Site Characterization Project Bibliography, 1992-1993 written by and published by . This book was released on 1994 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boron and Oxygen written by Gert Heller and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present issue, Volume 2 of "Boron Compounds" 4th Supplement of the Gmelin Hand book, updates the previous issues by reporting the literature on boron-oxygen systems published up to 1988. For some important recent developments literature is covered through mid-1992; this concerns, for example, the compounds ~-Ba3[B306h and U[B305J which became of interest as materials with nonlinear optical properties. The volume directly com plements the earlier "Boron Compounds" 3rd Supplement Volume 2. In the original literature, alternative formulations are frequently used for the same com pound. This is especially true for many borates. Often, these species are neither completely heteropolar nor covalent, and an experimentally based decision has not been made. Hence, the use of brackets does not necessarily reflect a truly salt-like character. Volume 1 (systems with hydrogen and noble gases) of this particular supplement will be published subsequently, whereas Volume 3a (boron and nitrogen), Volume 3b (boron and nitrogen, boron and fluorine), and Volume 4 (boron compounds containing Cl, Br, I, S, Se, and Te, as well as a section containing carboranes) have already been published. All volumes of the 4th supplement will be augmented by a formula index. The IUPAC nomenclature is generally adhered to; thf means tetrahydrofuran; and occa sionally additional abbreviations for compounds are explained in the text. Positive signs for chemical shifts of the NMR signals indicates downfield shifts from the references, usually internal (CH3)4Si for olH and 013C with others being specified.
Book Synopsis Phase Diagrams 6-III by : Allen Alper
Download or read book Phase Diagrams 6-III written by Allen Alper and published by Elsevier. This book was released on 2012-12-02 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase Diagrams: Materials Science and Technology, Volume III is an eight-chapter text that deals with the use of phase diagrams in electronic materials and glass technology. This volume first describes several crystal-growth techniques and the use of phase diagrams in crystals grown from high-temperature systems. This is followed by discussions on phase problems encountered in semiconductor studies with compound semiconductors and the use of phase diagrams in illustrating superconducting state and superconductivity property of materials. A chapter deals with the preparation of metastable phases by rapid quenching from the liquid (splat cooling) and the alloy constitution changes associated with their formation and properties, with a particular emphasis on the phase-diagram representation of metastable alloy phases. The discussion then shifts to metastable liquid immiscibility, occurrence, techniques of study, mechanisms of microphase separation, phase diagrams, and practical applications. This volume also examines the use of phase diagrams to obtain solubility data for high-temperature systems assisting in the prediction of dissolution behavior. The concluding chapters explore the relationships between phase diagrams and the structure of glass-forming oxide and phase studies of molten salts and their interactions with other salts and oxides. This book will be useful to all scientists, engineers, and materials science students who are investigating and developing materials, as well as to the end users of the materials.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
