Low thermal expansion glass-ceramics in the system BaO-Al2O3-B2O3 PDF Download

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Languages : de
Pages : 0

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Author: Diana Tauch
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Languages : de
Pages : 116

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ISBN: 9783662030851
Category : Ceramic materials
Languages : en
Pages : 223

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This book is one of a series reporting on international research and development activities conducted by the Schott group of companies. With the series, Schott aims to provide an overview of its activities for scientists, engineers, and managers from all branches of industry worldwide where glasses and glass ceramics are of interest. Each volume begins with a chapter providing a general idea of the current problems, results, and trends relating to the subjects treated. This volume describes the fundamental principles, the manufacturing process, and applications of low thermal expansion glass ceramics. The composition, structure, and stability of polycrystalline materials having a low thermal expansion are described, and it is shown how low thermal expansion glass ceramics can be manufactured from appropriately chosen glass compositions. Examples illustrate the formation of this type of glass ceramic by utilizing normal production processes together with controlled crystallization. Thus glass ceramics with thermal coefficients of expansion of less than 0.3 x 10( -6)K( -1) can be obtained. Even for the mass production of high-quality cooktop panels (Ceran (R)), oven windows, and other household appliances a high reproducibility of the properties is achieved. Special glass ceramics (Zerodur (R)) for technological and scientific applications such as high-precision optics or large astronomical mirrors are equally discussed.

Author: Hans Bach
Publisher:
ISBN: 9783662030844
Category :
Languages : en
Pages : 240

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Author: Dieter Krause
Publisher: Springer Science & Business Media
ISBN: 3540282459
Category : Science
Languages : en
Pages : 260

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This completely revised edition features new sections on glass-ceramic applications and their performance, CDC-grinding, and laser gyroscopes containing Zerodur®., providing an overview of Schott's activities for scientists, engineers, and managers.

Author: Mohsen Mhadhbi
Publisher: BoD – Books on Demand
ISBN: 1838812040
Category : Technology & Engineering
Languages : en
Pages : 298

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This book examines exciting advancements in the field of ceramics, including nanotechnology, clean energy, and tribology as well as fundamental concepts like defects and structure. It is a comprehensive discussion on how today’s ceramics are processed and used in many of today’s critical technologies. It discusses current techniques for synthesizing durable and cost-effective ceramic components with biocompatibility, complexity, and high precision. This book is a comprehensive reference for researchers, engineers, dental clinicians, biologists, academics, and students interested in ceramics.

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Glass ceramics were studied, formulated in the Na2O CaO. P2O5, Na2O. BaOP2O5, Na2O. Al2O3.P2O5, and Li2O. BaO. P2O5 systems to establish their suitability for sealing to high thermal expansion metals, e.g. aluminum, copper, and 300 series stainless steels. Glass ceramics in Na2O. CaO. P2O5 and Na2O. BaO. P2O5 systems have coefficients of thermal expansion in the range 140 x 10−1 per °C less than or equal to .cap alpha. less than or equal to 225 x 10−7 per °C and fracture toughness values generally greater than those of phosphate glasses; they are suitable for fabricating seals to high thermal expansion metals. Crystal phases include NaPo3, (NaPO3)3, NaBa(PO3)3, and NaCa(PO3)3. Glass ceramics formed in the Na2O. Al2O3.P2O5 systems have coefficients of thermal expansion greater than 240 x 10−7 per °C, but they have extensive microcracking. Due to their low thermal expansion values (.cap alpha. less than or equal to 120 x 10−7 per °C), glass ceramics in the Li2O. BaO. P2O5 system are unsuitable for sealing to high thermal expansion metals.

Author: N. Hannay
Publisher: Springer Science & Business Media
ISBN: 1468426648
Category : Science
Languages : en
Pages : 788

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The last quarter-century has been marked by the extremely rapid growth of the solid-state sciences. They include what is now the largest subfield of physics, and the materials engineering sciences have likewise flourished. And, playing an active role throughout this vast area of science and engineer ing have been very large numbers of chemists. Yet, even though the role of chemistry in the solid-state sciences has been a vital one and the solid-state sciences have, in turn, made enormous contributions to chemical thought, solid-state chemistry has not been recognized by the general body of chemists as a major subfield of chemistry. Solid-state chemistry is not even well defined as to content. Some, for example, would have it include only the quantum chemistry of solids and would reject thermodynamics and phase equilibria; this is nonsense. Solid-state chemistry has many facets, and one of the purposes of this Treatise is to help define the field. Perhaps the most general characteristic of solid-state chemistry, and one which helps differentiate it from solid-state physics, is its focus on the chemical composition and atomic configuration of real solids and on the relationship of composition and structure to the chemical and physical properties of the solid. Real solids are usually extremely complex and exhibit almost infinite variety in their compositional and structural features.

Author: Zongping Shao
Publisher: Springer
ISBN: 366252936X
Category : Technology & Engineering
Languages : en
Pages : 271

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This book discusses recent advances in intermediate-temperature solid oxide fuel cells (IT-SOFCs), focusing on material development and design, mechanism study, reaction kinetics and practical applications. It consists of five chapters presenting different types of reactions and materials employed in electrolytes, cathodes, anodes, interconnects and sealants for IT-SOFCs. It also includes two chapters highlighting new aspects of these solid oxide fuel cells and exploring their practical applications. This insightful and useful book appeals to a wide readership in various fields, including solid oxide fuel cells, electrochemistry, membranes and ceramics. Zongping Shao is a Professor at the State Key Laboratory of Materials-Oriented Chemical Engineering and the College of Energy, Nanjing University of Technology, China. Moses O. Tade is a Professor at the Department of Chemical Engineering, Curtin University, Australia.

Author: Wolfram Holand
Publisher: John Wiley & Sons
ISBN: 1118265920
Category : Technology & Engineering
Languages : en
Pages : 456

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Glass-ceramic materials share many properties with both glass and more traditional crystalline ceramics. This new edition examines the various types of glass-ceramic materials, the methods of their development, and their countless applications. With expanded sections on biomaterials and highly bioactive products (i.e., Bioglass and related glass ceramics), as well as the newest mechanisms for the development of dental ceramics and theories on the development of nano-scaled glass-ceramics, here is a must-have guide for ceramic and materials engineers, managers, and designers in the ceramic and glass industry.