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Dielectric Properties Of Porous Media

Author: S.O. Gladkov
Publisher: Springer Science & Business Media
ISBN: 3662067056
Size: 48.33 MB
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This monograph systematically presents the fundamentals of theoretical and experimental research into the most important physical characteristics of porous structures. Non-standard behavior of certain physical parameters, such as the breakdown of the electric field of porous substances, is described. The method of calculation of the thermal conductivity coefficient of porous dielectrics, based on the non-equilibrium principle, is illustrated in detail. This approach is then applied to the investigation of the properties of "disparate" substances such as cellulose matrices, composites, and fibrous structures. The book is intended for physicists, physical chemists and materials scientists at research and postgraduate levels; it may also be helpful to engineers and technical workers in the applied sciences.

Electronic Structure And Magnetism Of Complex Materials

Author: David J. Singh
Publisher: Springer Science & Business Media
ISBN: 3662053101
Size: 75.62 MB
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Recent developments in electronic structure theory have led to a new understanding of magnetic materials at the microscopic level. This enables a truly first-principles approach to investigations of technologically important magnetic materials. Among the advances treated here have been practical schemes for handling non-collinear magnetic systems, including relativity, and an understanding of the origins and role of orbital magnetism within band structure formalisms. This book provides deep theoretical insight into magnetism, mahneatic materials, and magnetic systems. It covers these recent developments with review articles by some of the main originators of these developments.

Point Defects In Semiconductors And Insulators

Author: Johann-Martin Spaeth
Publisher: Springer Science & Business Media
ISBN: 3642556159
Size: 46.83 MB
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The precedent book with the title "Structural Analysis of Point Defects in Solids: An introduction to multiple magnetic resonance spectroscopy" ap peared about 10 years ago. Since then a very active development has oc curred both with respect to the experimental methods and the theoretical interpretation of the experimental results. It would therefore not have been sufficient to simply publish a second edition of the precedent book with cor rections and a few additions. Furthermore the application of the multiple magnetic resonance methods has more and more shifted towards materials science and represents one of the important methods of materials analysis. Multiple magnetic resonances are used less now for "fundamental" studies in solid state physics. Therefore a more "pedestrian" access to the meth ods is called for to help the materials scientist to use them or to appreciate results obtained by using these methods. We have kept the two introduc tory chapters on conventional electron paramagnetic resonance (EPR) of the precedent book which are the base for the multiple resonance methods. The chapter on optical detection of EPR (ODEPR) was supplemented by sections on the structural information one can get from "forbidden" transitions as well as on spatial correlations between defects in the so-called "cross relaxation spectroscopy". High-field ODEPR/ENDOR was also added. The chapter on stationary electron nuclear double resonance (ENDOR) was supplemented by the method of stochastic END OR developed a few years ago in Paderborn which is now also commercially available.

Electrokinetics For Petroleum And Environmental Engineers

Author: G. V. Chilingar
Publisher: John Wiley & Sons
ISBN: 1118842839
Size: 72.64 MB
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Electrokinetics is a term applied to a group of physicochemicalphenomena involving the transport of charges, action of chargedparticles, effects of applied electric potential and fluidtransport in various porous media to allow for a desired migrationor flow to be achieved. These phenomena include electrokinetics,electroosmosis, ion migration, electrophoresis, streaming potentialand electroviscosity. These phenomena are closely related and allcontribute to the transport and migration of different ionicspecies and chemicals in porous media. The physicochemical andelectrochemical properties of a porous medium and the pore fluid,and the magnitudes of the applied electrical potential all impactthe direction and velocity of the fluid flow. Also, an electricalpotential is generated upon the forced passage of fluid carryingcharged particles through a porous medium. The use of electrokinetics in the field of petroleum andenvironmental engineering was groundbreaking when George Chilingarpioneered its use decades ago, but it has only been in recent yearsthat its full potential has been studied. This is the firstvolume of its kind ever written, offering the petroleum orenvironmental engineer a practical “how to” book onusing electrokinetics for more efficient and better oil recoveryand recovery from difficult reservoirs. This groundbreaking volume is a must-have for any petroleumengineer working in the field, and for students and faculty inpetroleum engineering departments worldwide.

Low Dielectric Constant Materials For Ic Applications

Author: Paul S. Ho
Publisher: Springer Science & Business Media
ISBN: 3642559085
Size: 59.14 MB
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Low dielectric constant materials are an important component of microelectronic devices. This comprehensive book covers the latest low-dielectric-constant (low-k) materials technology, thin film materials characterization, integration and reliability for back-end interconnects and packaging applications in microelectronics. Highly informative contributions from leading academic and industrial laboratories provide comprehensive information about materials technologies for

Physics Of Finely Divided Matter

Author: N. Boccara
Publisher: Springer Science & Business Media
ISBN: 3642933017
Size: 28.15 MB
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The Second Winter School on the "~hysics of Finely Divided Matter" was held at the Centre de Physique des Houches from 25 March to 5 April 1985. This meeting brought together experts from the areas of gels and porous media. People with different backgrounds - chemists, physicists - from university as well as industrial labora tories, had the opportunity to compare their most recent experimental and theoreti cal results. Although the experimental situations and techniques may seem at first sight unrelated, the theoretical interpretations are very similar and may be divided roughly into two categories: percolation and aggregation. These are present for the description of the synthesis of some gels as well as for a description of the struc ture of packings. They are also a precious help for understanding flows in porous media and hydrodynamic instabilities such as viscous fingering. A different aspect, still in its early stages, deals with the influence of a ran dom medium on a phase transition. This leads to metastable states and is interpreted in terms of random fields. The following topics were covered: introduction to physical and chemical gels structure of packings and porous media microemulsions percol ati on aggregation elastic and dielectric properties of ill-connected media properties of gels near and far from the gelation threshold flow, diffusion and dispersion in porous media transitions in porous media. Most of these are rapidly growing subjects, and we hope that these proceedings will serve as a reference for those entering this fascinating area.

Percolation Theory For Flow In Porous Media

Author: Allen Hunt
Publisher: Springer Science & Business Media
ISBN: 3540897895
Size: 22.45 MB
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Why would we wish to start a 2nd edition of “Percolation theory for ?ow in porous media” only two years after the ?rst one was ?nished? There are essentially three reasons: 1) Reviews in the soil physics community have pointed out that the introductory material on percolation theory could have been more accessible. Our additional experience in teaching this material led us to believe that we could improve this aspect of the book. In the context of rewriting the ?rst chapter, however, we also expanded the discussion of Bethe lattices and their relevance for “classical” - ponents of percolation theory, thus giving more of a basis for the discussion of the relevance of hyperscaling. This addition, though it will not tend to make the book more accessible to hydrologists, was useful in making it a more complete reference, and these sections have been marked as being possible to omit in a ?rst reading. It also forced a division of the ?rst chapter into two. We hope that physicists without a background in percolation theory will now also ?nd the - troductory material somewhat more satisfactory. 2) We have done considerable further work on problems of electrical conductivity, thermal conductivity, and electromechanical coupling.

Heterogeneous Materials I

Author: Muhammad Sahimi
Publisher: Springer Science & Business Media
ISBN: 0387217053
Size: 30.46 MB
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This monograph describes and discusses the properties of heterogeneous materials, including conductivity, elastic moduli, and dielectrical constant. The book outlines typical experimental methods, and compares the experimental data and the theoretical predictions. This multidisciplinary book will appeal to applied physicists, materials scientists, chemical and mechanical engineers, chemists, and applied mathematicians.