Описание: This book summarizes recent research and development in the field of nanostructured ceramics and their composites. It presents selected examples of ceramic materials with special electronic, catalytic and optical properties and exceptional mechanical characteristics. A special focus is on sol-gel based and organic-inorganic hybrid nanoceramic materials. The book highlights examples for preparation techniques including scale-up, properties of smart ceramic composites, and applications including e.g. waste water treatment, heavy metal removal, sensors, electronic devices and fuel cells. Recent challenges are addressed and potential solutions are suggested for these. This book hence addresses chemists, materials scientists, and engineers, working with nanoceramic materials and on their applications.
Описание: This book presents wet chemical sol-gel and hydrothermal methods for 1D oxide nanostructure preparation. These methods represent an attractive route to multifunctional nanomaterials synthesis, as they are versatile, inexpensive and, thus, appropriate for obtaining a wide range of oxide materials with tailored morphology and properties. Three specific oxides (SiO2, TiO2, ZnO) are discussed in detail in order to illustrate the principle of the sol-gel and hydrothermal preparation of 1D oxide nanostructures. Other oxides synthesized via this method are also briefly presented. Throughout the book, the correlation between the tubular structure and the physico-chemical properties of these materials is highlighted. 1D oxide nanostructures exhibit interesting optical and electrical properties, due to their confined morphology. In addition, a well-defined geometry can be associated with chemically active species. For example, the pure SiO2 nanotubes presented a slight photocatalytic activity, while the Pt-doped SiO2 tubular materials act as microreactors in catalytic reactions. In the case of titania and titanate nanotubes, large specific surface area and pore volume, ion-exchange ability, enhanced light absorption, and fast electron-transport capability have attracted significant research interest. The chemical and physical modifications (microwave assisted hydrothermal methods) discussed here improve the formation kinetics of the nanotubes. The ZnO nanorods/tubes were prepared as random particles or as large areas of small, oriented 1D ZnO nanostructures on a variety of substrates. In the latter case a sol-gel layer is deposited on the substrate prior to the hydrothermal preparation. Using appropriate dopants, coatings of ZnO nanorods with controlled electrical behavior can be obtained.
Описание: Discusses recent technological applications and advances in sol-gel processing of various ceramics, gels and glasses. Also features historical aspects from the initial discovery of the development of sol-gel processing for ceramics 50 years ago.
Описание: This volume brings you the latest developments in thin and thick films, powders, composites and hybrids, and display applications of advanced ceramic materials. The unique focus of this collection of papers is its concentration on the commercialization of sol-gel processing.
Автор: Cohen Addad Название: Physical Properties of Polymeric Gels ISBN: 0471939714 ISBN-13(EAN): 9780471939719 Издательство: Wiley Рейтинг: Цена: 72222.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book emphasizes the relationship between the microscopic structure of gels and their macroscopic behaviour. Deals with organic polymeric gels, focusing on experimental methods which have only recently been introduced to study both reversible and irreversible gels.
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