Predicting the Young's Modulus of Silicate Glasses by Molecular Dynamics Simulations and Machine Learning

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ISBN 13 :
Total Pages : 85 pages
Book Rating : 4.:/5 (116 download)

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Book Synopsis Predicting the Young's Modulus of Silicate Glasses by Molecular Dynamics Simulations and Machine Learning by : Kai Yang

Download or read book Predicting the Young's Modulus of Silicate Glasses by Molecular Dynamics Simulations and Machine Learning written by Kai Yang and published by . This book was released on 2020 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the compositional dependence of properties of silicate glass is critical to design novel glasses for various technology applications. With the development in molecular dynamics simulations and machine learning techniques, a combined and fully computational approach, which is able to reveal the relationship between glass composition and its mechanical properties, can be developed and served as a guide prior to experiments and manufacturing. On one hand, machine learning is a powerful tool to predict the properties based on the existing database. On the other hand, molecular dynamics simulation cannot only produce sufficient data points for machine learning models but also provide a detailed picture of the atomic structure of glasses. This atomic-scale knowledge from molecular dynamics simulation contains an intrinsic relationship between glass compositions and their mechanical properties. Here, we first use molecular dynamics simulation to generate the dataset for calcium aluminosilicate glasses and apply different machine learning models to predict their Young's modulus using glass compositions in Chapter 1. Next, we apply topological constraint theory to quantify the atomic structures of simulated glasses and use this knowledge to predict Young's modulus for calcium aluminosilicate glass family in Chapter 2. Last, in Chapter 3, we propose a fully analytical model to link the network topology with glass compositions.

Atomistic Simulations of Glasses

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Publisher : John Wiley & Sons
ISBN 13 : 1118940245
Total Pages : 564 pages
Book Rating : 4.1/5 (189 download)

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Book Synopsis Atomistic Simulations of Glasses by : Jincheng Du

Download or read book Atomistic Simulations of Glasses written by Jincheng Du and published by John Wiley & Sons. This book was released on 2022-03-29 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete reference to computer simulations of inorganic glass materials In Atomistic Simulations of Glasses: Fundamentals and Applications, a team of distinguished researchers and active practitioners delivers a comprehensive review of the fundamentals and practical applications of atomistic simulations of inorganic glasses. The book offers concise discussions of classical, first principles, Monte Carlo, and other simulation methods, together with structural analysis techniques and property calculation methods for the models of glass generated from these atomistic simulations, before moving on to practical examples of the application of atomistic simulations in the research of several glass systems. The authors describe simulations of silica, silicate, aluminosilicate, borosilicate, phosphate, halide and oxyhalide glasses with up-to-date information and explore the challenges faced by researchers when dealing with these systems. Both classical and ab initio methods are examined and comparison with experimental structural and property data provided. Simulations of glass surfaces and surface-water reactions are also covered. Atomistic Simulations of Glasses includes multiple case studies and addresses a variety of applications of simulation, from elucidating the structure and properties of glasses for optical, electronic, architecture applications to high technology fields such as flat panel displays, nuclear waste disposal, and biomedicine. The book also includes: A thorough introduction to the fundamentals of atomistic simulations, including classical, ab initio, Reverse Monte Carlo simulation and topological constraint theory methods Important ingredients for simulations such as interatomic potential development, structural analysis methods, and property calculations are covered Comprehensive explorations of the applications of atomistic simulations in glass research, including the history of atomistic simulations of glasses Practical discussions of rare earth and transition metal-containing glasses, as well as halide and oxyhalide glasses In-depth examinations of glass surfaces and silicate glass-water interactions Perfect for glass, ceramic, and materials scientists and engineers, as well as physical, inorganic, and computational chemists, Atomistic Simulations of Glasses: Fundamentals and Applications is also an ideal resource for condensed matter and solid-state physicists, mechanical and civil engineers, and those working with bioactive glasses. Graduate students, postdocs, senior undergraduate students, and others who intend to enter the field of simulations of glasses would also find the book highly valuable.

Understanding Structure, Thermodynamics, and Dynamics of Silica Liquids and Glasses Using Atomistic Simulations and Machine Learning

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)

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Book Synopsis Understanding Structure, Thermodynamics, and Dynamics of Silica Liquids and Glasses Using Atomistic Simulations and Machine Learning by : Zheng Yu

Download or read book Understanding Structure, Thermodynamics, and Dynamics of Silica Liquids and Glasses Using Atomistic Simulations and Machine Learning written by Zheng Yu and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass materials are found all around us, but fundamental questions about the nature of their amorphous structures and formation processes remain unsolved after decades of research. In this dissertation, silica, an archetype glass former, is taken as an example glass for investigations into glass structures, thermodynamics, dynamics, two-level systems (TLS), and atomic interactions based on molecular dynamics simulations and machine learning methods. Specifically, we investigate the structure-thermodynamic stability relationship using a library of silica inherent structures generated from melt-quench and replica exchange molecular dynamics simulations. Based on machine learning, we find that short-range and medium-range features play very different roles on the glass stability across the liquid and glass regions. We then revisit an interesting dynamical transition in silica liquid, the fragile-to-strong transition (FTS), from the perspective of microscopic dynamics. By machine learning to classify atomic rearrangements, the FTS is found to originate from the two types of energy barriers in silica, representing a fast and a slow microscopic dynamics channel. The fast channel controlled by the short-range defects closes rapidly with decreasing temperature, causing the fragility crossover. A similar approach is also applied to investigate TLS. We predict TLS densities in a large number of inherent structures with a variety of glass stability using machine learning and verify them using molecular dynamics simulations. We find a decrease in the TLS density with the fictive temperature, which can be described by a quadratic function as suggested by the random first-order transition theory. Lastly, we introduce a linear machine learning force matching approach that can directly extract pair atomic interactions from ab initio calculations in amorphous materials. This approach is applied to silica to understand the atomic interactions within its structure and develop a new classical force field. Through the comprehensive fundamental investigations on the nature of silica glass and liquid, I hope the understandings and methods presented in this dissertation can be transferred to study other glass-forming systems.

Geological Melts

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Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 1501510932
Total Pages : 1108 pages
Book Rating : 4.5/5 (15 download)

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Book Synopsis Geological Melts by : Daniel R. Neuville

Download or read book Geological Melts written by Daniel R. Neuville and published by Walter de Gruyter GmbH & Co KG. This book was released on 2022-07-04 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 87 of Reviews in Mineralogy and Geochemistry covers fundamental aspects of the nature of silicate melts and the implications for the systems in which they participate, both technological and natural. The contents of this volume may perhaps best be summarized as structure – properties – dynamics. The volume contains syntheses of short and medium range order, structure-property relationships, and computation-based simulations of melt structure. It continues with analyses of the properties (mechanical, diffusive, thermochemical, redox, nucleation, rheological) of melts. The dynamic behavior of melts in magmatic and volcanic systems, is then treated in the context of their behavior in magma mixing, strain localization, frictional melting, magmatic fragmentation, and hot sintering. Finally, the non-magmatic, extraterrestrial and prehistoric roles of melt and glass are presented in their respective contexts.

Machine Learning for Materials Discovery

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Publisher : Springer Nature
ISBN 13 : 3031446224
Total Pages : 287 pages
Book Rating : 4.0/5 (314 download)

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Book Synopsis Machine Learning for Materials Discovery by : N. M. Anoop Krishnan

Download or read book Machine Learning for Materials Discovery written by N. M. Anoop Krishnan and published by Springer Nature. This book was released on with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Molecular Dynamics Simulations of the Structure and Failure of Silicate Glasses

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (781 download)

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Book Synopsis Molecular Dynamics Simulations of the Structure and Failure of Silicate Glasses by : Laura R. V. Adkins

Download or read book Molecular Dynamics Simulations of the Structure and Failure of Silicate Glasses written by Laura R. V. Adkins and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Molecular Dynamics Simulation of Silicate Glasses and Their Surfaces

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (671 download)

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Book Synopsis Molecular Dynamics Simulation of Silicate Glasses and Their Surfaces by : Xianglong Yuan

Download or read book Molecular Dynamics Simulation of Silicate Glasses and Their Surfaces written by Xianglong Yuan and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Molecular Dynamics Computer Simulation Study of Bulk Silicate Glasses and Silicate Surfaces

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Publisher :
ISBN 13 :
Total Pages : 446 pages
Book Rating : 4.:/5 (551 download)

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Book Synopsis A Molecular Dynamics Computer Simulation Study of Bulk Silicate Glasses and Silicate Surfaces by : David Michael Zirl

Download or read book A Molecular Dynamics Computer Simulation Study of Bulk Silicate Glasses and Silicate Surfaces written by David Michael Zirl and published by . This book was released on 1991 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Molecular Dynamics Simulation of the Structure of Silicate Glasses Containing Hydroxyl Groups and Rare Earth Ions

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (671 download)

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Book Synopsis Molecular Dynamics Simulation of the Structure of Silicate Glasses Containing Hydroxyl Groups and Rare Earth Ions by : Jincheng Du

Download or read book Molecular Dynamics Simulation of the Structure of Silicate Glasses Containing Hydroxyl Groups and Rare Earth Ions written by Jincheng Du and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Molecular Dynamics Simulations of Silicate and Borate Glasses and Melts

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ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.:/5 (921 download)

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Book Synopsis Molecular Dynamics Simulations of Silicate and Borate Glasses and Melts by : Christoph Scherer

Download or read book Molecular Dynamics Simulations of Silicate and Borate Glasses and Melts written by Christoph Scherer and published by . This book was released on 2015 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Decoding the Relationship Between Composition and Various Properties of Calcium Silicate and Calcium Aluminosilicate Glasses

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Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (114 download)

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Book Synopsis Decoding the Relationship Between Composition and Various Properties of Calcium Silicate and Calcium Aluminosilicate Glasses by : Yushu Hu

Download or read book Decoding the Relationship Between Composition and Various Properties of Calcium Silicate and Calcium Aluminosilicate Glasses written by Yushu Hu and published by . This book was released on 2020 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation contributes to decode the relationship between glass composition and various properties that are crucial to novel glass design by performing molecular dynamics simulations. The topics include the prediction of glass transition temperature, the origin of glass-forming ability, and the impact of cooling rate on glass relaxation. In general, the first two properties are analyzed by utilizing topological constraint theory. By combining molecular dynamics simulations and topological constraint theory, a fully analytical model is developed to predict the fictive glass transition temperature of (CaO)x(SiO2)1-x glass system. To be specific, this model takes composition as input and provides the prediction of glass transition temperature as output. On the other hand, glass-forming ability is an important factor that guides the manufacturing process while sometimes imposes limitations to glass engineering. Despite many empirical successes to identify and characterize glass-forming ability in various glass systems, there exists a lack of knowledge of physical details in the glass structure. Here, we conduct molecular dynamics simulations of a series of calcium silicate glasses. We show that the flexible-to-rigid topological transition coincides with the compositional window that has optimal glass-forming ability. By explaining this transition from the aspect of internal flexibility and internal stress within the network, we aim to provide an alternative topological explanation for the nature of glass-forming ability. Chapter 3 is a reprint of a previously published journal article. It demonstrates the impact of cooling rate on glass transition by analyzing glass relaxation and hysteresis of a series of silicate glasses. It proves that by extrapolating simulation data, one can access the results that are close to those generated from experimental cooling rates.

Information Science for Materials Discovery and Design

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Publisher : Springer
ISBN 13 : 331923871X
Total Pages : 316 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Information Science for Materials Discovery and Design by : Turab Lookman

Download or read book Information Science for Materials Discovery and Design written by Turab Lookman and published by Springer. This book was released on 2015-12-12 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with an information-driven approach to plan materials discovery and design, iterative learning. The authors present contrasting but complementary approaches, such as those based on high throughput calculations, combinatorial experiments or data driven discovery, together with machine-learning methods. Similarly, statistical methods successfully applied in other fields, such as biosciences, are presented. The content spans from materials science to information science to reflect the cross-disciplinary nature of the field. A perspective is presented that offers a paradigm (codesign loop for materials design) to involve iteratively learning from experiments and calculations to develop materials with optimum properties. Such a loop requires the elements of incorporating domain materials knowledge, a database of descriptors (the genes), a surrogate or statistical model developed to predict a given property with uncertainties, performing adaptive experimental design to guide the next experiment or calculation and aspects of high throughput calculations as well as experiments. The book is about manufacturing with the aim to halving the time to discover and design new materials. Accelerating discovery relies on using large databases, computation, and mathematics in the material sciences in a manner similar to the way used to in the Human Genome Initiative. Novel approaches are therefore called to explore the enormous phase space presented by complex materials and processes. To achieve the desired performance gains, a predictive capability is needed to guide experiments and computations in the most fruitful directions by reducing not successful trials. Despite advances in computation and experimental techniques, generating vast arrays of data; without a clear way of linkage to models, the full value of data driven discovery cannot be realized. Hence, along with experimental, theoretical and computational materials science, we need to add a “fourth leg’’ to our toolkit to make the “Materials Genome'' a reality, the science of Materials Informatics.

Molecular Dynamics Simulation and Crystal-field Theory

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Molecular Dynamics Simulation and Crystal-field Theory by : Guy Cormier

Download or read book Molecular Dynamics Simulation and Crystal-field Theory written by Guy Cormier and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Atomistic-simulations of Silicate Glasses

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)

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Book Synopsis Atomistic-simulations of Silicate Glasses by : Seung Ho Hahn

Download or read book Atomistic-simulations of Silicate Glasses written by Seung Ho Hahn and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicate-based glasses are one of the most versatile materials in terms of technological perspective with a wide range of industrial applications. In most cases, glass products are exposed to various aqueous environments (either humid air or liquid water) and subject to physical contact with foreign objects, which leads to deterioration of chemical and mechanical properties of glass surfaces. Therefore, understanding their interactions with adsorbed interfacial water molecules is critical as it can provide physical insights needed for rational design of more durable glasses. Experimental characterization approaches have been applied to tackle difficult problems associated with the complex nature of glass surfaces but they are often limited by the time-scale resolution. As a result, they have failed to offer important structural characteristics and chemical reaction mechanisms under dynamic processes happening at the glass surface. To complement the challenges that experimental endeavors are encountering, this dissertation aims to provide a comprehensive understanding of water interactions of silicate glass surfaces using atomistic-scale simulations techniques. In particular, ReaxFF reactive force field-based molecular dynamics (MD) simulations are employed to study two distinct surface phenomena, i) surface water reaction and ii) surface mechanochemical wear process. These studies represent the surface damage process of silicate glass in the absence and presence of mechanical actions, respectively. The first part of this dissertation describes the water interactions of a silicate glass with readily leachable alkali (sodium) ions. In this study, highly complex surface chemistry, including proton/water exchange with the sodium ions, formation of relatively long-living sodium-hydroxide ionic complexes at the glass surface and eventual dissolution of those ion pairs into the water phase are described. Also, surface mapping of water binding energy to the glass surface is evaluated at different stages of the glass-water reaction, which would be relevant to assess the chemical durability of the glass materials based on the glass network topology. After the transport behavior and glass-water reaction mechanism at the surface has been identified, the mechanochemical wear process of sodium silicate glass rubbed with amorphous silica in the absence and presence of interfacial water molecules is covered in the second part of this dissertation. The effect of water molecules on the shear-induced chemical reaction at the sliding interface was investigated and the dependence of wear on the number of interfacial water molecules in ReaxFF-MD simulations was found to be qualitatively in reasonable agreement with the experimental data. The large-scale atomistic simulation approaches with ReaxFF reactive force field presented in this dissertation alleviates the limitations of DFT calculations and experiments, providing new and meaningful insights on the chemical dynamics associated within the glass-water interface.

Simulation of Glass

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis Simulation of Glass by : Zhe Wang

Download or read book Simulation of Glass written by Zhe Wang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass is one of the most important and frequently used materials due to its special properties: its hardness and transparency makes it an ideal material for windows, and its stability makes it a great candidate for immobilizing radioactive nuclear waste, etc. As a result, almost all aspects of glass ranging from its fabrication, properties and application, characterization, to stability and destruction have been hot topics of material science research for a long time. Among all researching methods, molecular dynamics (MD) simulation is a new emerging technique that has been applied more and more to glass research in modern years thanks to its advantages over conventional experimental methods such as high efficiency, high accuracy and low cost. This thesis focuses on using MD simulations to evaluate glass properties from two main aspects: 1) the equivalence of glasses produced from modern methods such as vapor deposition, sol-gel condensation and irradiation and those fabricated from conventional melt-quenching, and 2) the effects of temperature, pH and glass composition on zeolite precipitation during the nuclear waste immobilization glass dissolution process. The thesis is thus divided based on these two topics. In Chapter I, we aim to compare the equivalence of SiO2 glasses obtained from MD-simulated vapor deposition, sol-gel condensation and irradiation processes and the melt-quenched glasses. That is, to evaluate whether these glasses can (available) or cannot (forbidden) be obtained by using the traditional melt-quenching method by changing the cooling rate. We will show that the availability of glasses can be determined and explained by observing the medium-range structural features and the energy landscape of the atoms. In Chapter II, we explore another important field of glass application: the nuclear waste-immobilization glass dissolution. Though vitrification: the process of melting and mixing radioactive nuclear waste and glassy materials, is widely considered the best way of treating nuclear waste due to the extraordinary stability of glasses, observation of continuous glass dissolution (alteration resumption process, or stage III of the nuclear waste-immobilization glasses dissolution process) is reported in many experimental cases which will lead to nuclear waste leakage. Though the exact reason of alteration resumption is still being discussed, it is generally believed that this phenomenon is closely related to the precipitation of secondary phases like zeolites. Based on ab initio MD simulations, we first construct a complete methodology to calculate the thermodynamic properties (enthalpy and entropy of formation, heat capacity, etc.) of any zeolites given its composition and lattice structure. Moreover, with these thermodynamic data of zeolites, we use Gibbs free Energy Minimization (GEM) simulation to build a database of zeolite precipitation under various temperatures, pHs and initial glass compositions. Finally, we manage to train a machine learning (ML) model using the precipitation database that can predict zeolite formation given the aforementioned conditions as inputs.

Machine Learning Approach for Predicting the Elastic Properties and Glass Forming Ability of Metallic Glasses

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ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (15 download)

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Book Synopsis Machine Learning Approach for Predicting the Elastic Properties and Glass Forming Ability of Metallic Glasses by : Jie Xiong

Download or read book Machine Learning Approach for Predicting the Elastic Properties and Glass Forming Ability of Metallic Glasses written by Jie Xiong and published by . This book was released on 2018 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fundamentals of Inorganic Glasses

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Publisher : Elsevier
ISBN 13 : 0128162260
Total Pages : 753 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Fundamentals of Inorganic Glasses by : Arun K. Varshneya

Download or read book Fundamentals of Inorganic Glasses written by Arun K. Varshneya and published by Elsevier. This book was released on 2019-05-09 with total page 753 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Inorganic Glasses, Third Edition, is a comprehensive reference on the field of glass science and engineering that covers numerous, significant advances. This new edition includes the most recent advances in glass physics and chemistry, also discussing groundbreaking applications of glassy materials. It is suitable for upper level glass science courses and professional glass scientists and engineers at industrial and government labs. Fundamental concepts, chapter-ending problem sets, an emphasis on key ideas, and timely notes on suggested readings are all included. The book provides the breadth required of a comprehensive reference, offering coverage of the composition, structure and properties of inorganic glasses. Clearly develops fundamental concepts and the basics of glass science and glass chemistry Provides a comprehensive discussion of the composition, structure and properties of inorganic glasses Features a discussion of the emerging applications of glass, including applications in energy, environment, pharmaceuticals, and more Concludes chapters with problem sets and suggested readings to facilitate self-study