Electrically Based Microstructural Characterization Ii

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Electrically Based Microstructural Characterization Ii

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Author :
language : en
Publisher:
Release Date :

Electrically Based Microstructural Characterization Ii written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.

Electrically Based Microstructural Characterization Ii

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Author : Rosario A. Gerhardt
language : en
Publisher: Cambridge University Press
Release Date : 2014-06-05

Electrically Based Microstructural Characterization Ii written by Rosario A. Gerhardt and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-05 with Technology & Engineering categories.

This book provides a forum for researchers who have been using a variety of electrical measurements as a means to obtain microstructural information about their materials. Microstructure in this context includes features at all length scales - atomic to macroscopic. Even though numerous examples of microstructure/electrical property correlations exist, this book focuses on the myriad of applications that have already been successful. In addition, advances in techniques for the interpretation of data and modelling of materials-related phenomena are emphasized. The effects of percolation and connectivity of electrical paths are of particular interest as they determine the resultant electrical response. These in turn are intimately linked to how a material is processed, what phases it contains, and how the phases are distributed in real space. All classes of materials are covered including semiconductors, electroceramics, biological materials, polymers, metals, geomaterials and a variety of composites. Topics include: advances in localized electrical testing; semiconductor and microelectronic applications; magnetic and polymeric materials; dielectrics and ferroelectrics; varistors; ionic and mixed conductors and composites and percolation systems.

Electrically Based Microstructural Characterization

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Author :
language : en
Publisher:
Release Date : 1995

Electrically Based Microstructural Characterization written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Materials categories.

Numerical Simulation Of Pore Scale Heterogeneity And Its Effects On Elastic Electrical And Transport Properties

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Author : Ratnanabha Sain
language : en
Publisher: Stanford University
Release Date : 2010

Numerical Simulation Of Pore Scale Heterogeneity And Its Effects On Elastic Electrical And Transport Properties written by Ratnanabha Sain and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

This dissertation describes numerical experiments quantifying the influence of pore-scale heterogeneities and their evolution on macroscopic elastic, electrical and transport properties of porous media. We design, implement and test a computational recipe to construct granular packs and consolidated microstructures replicating geological processes and to estimate the link between process-to-property trends. This computational recipe includes five constructors: a Granular Dynamics (GD) simulation, an Event Driven Molecular Dynamics (EDMD) simulation and three computational diagenetic schemes; and four property estimators based on GD for elastic, finite-elements (FE) for elastic and electrical conductivity, and Lattice-Boltzmann method (LBM) for flow property simulations. Our implementation of GD simulation is capable of constructing realistic, frictional, jammed sphere packs under isotropic and uniaxial stress states. The link between microstructural properties in these packs, like porosity and coordination number (average number of contacts per grain), and stress states (due to compaction) is non-unique and depends on assemblage process and inter-granular friction. Stable jammed packs having similar internal stress and coordination number (CN) can exist at a range of porosities (38-42%) based on how fast they are assembled or compressed. Similarly, lower inter-grain friction during assemblage creates packs with higher coordination number and lower porosity at the same stress. Further, the heterogeneities in coordination number, spatial arrangement of contacts, the contact forces and internal stresses evolve with compaction non-linearly. These pore-scale heterogeneities impact effective elastic moduli, calculated by using infinitesimal perturbation method. Simulated stress-strain relationships and pressure-dependent elastic moduli for random granular packs show excellent match with laboratory experiments, unlike theoretical models based on Effective Medium Theory (EMT). We elaborately discuss the reasons why Effective Medium Theory (EMT) fails to correctly predict pressure-dependent elastic moduli, stress-strain relationships and stress-ratios (in uniaxial compaction) of granular packs or unconsolidated sediments. We specifically show that the unrealistic assumption of homogeneity in disordered packs and subsequent use of continuum elasticity-based homogeneous strain theory creates non-physical packs, which is why EMT fails. In the absence of a rigorous theory which can quantitatively account for heterogeneity in random granular packs, we propose relaxation corrections to amend EMT elastic moduli predictions. These pressure-dependent and compaction-dependent (isotropic or uniaxial) correction factors are rigorously estimated using GD simulation without non-physical approximations. Further, these correction factors heuristically represent the pressure-dependent heterogeneity and are also applicable for amending predictions of theoretical cementation models, which are conventionally used for granular packs. For predicting stress-ratios in uniaxial compaction scenario, we show the inappropriateness of linear elasticity-based equations, which use elastic constants only and do not account for dissipative losses like grain sliding. We further implement and test a computational recipe to construct consolidated microstructures based on different geological scenarios, like sorting, compaction, cementation types and cement materials. Our diagenetic trends of elastic, electrical and transport properties show excellent match with laboratory experiments on core plugs. This shows the feasibility of implementing a full-scale computational-rock-physics-based laboratory to construct and estimate properties based on geological processes. However, the elastic property estimator (FE simulation) shows limitations of finite resolution while computing elastic properties of unconsolidated sediments and fluid-saturated microstructures.

Solid State Ionics Materials Devices Procs Of The 7th Asian Conf

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Author : B V R Chowdari
language : en
Publisher: World Scientific
Release Date : 2000-10-27

Solid State Ionics Materials Devices Procs Of The 7th Asian Conf written by B V R Chowdari and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-10-27 with Science categories.

Solid state ionics, being a multidisciplinary area, is expected to grow at a faster rate in the new millennium, prompting the discovery of new materials and devices, as well as helping to optimize the known devices, especially the portable power sources and display systems. The Asian Society for Solid State Ionics (ASSSI) plays a significant role in bringing together researchers from the Asian countries, every two years, to exchange notes and ideas, to foster friendship and collaboration, and to discuss the prospects.The topics covered in this volume are: ion dynamics, theoretical modeling, ion-conducting polymers, gels and ceramics, glasses, crystalline materials including nano-phases, composites, electrode/electrolyte interfaces and novel experimental techniques. Papers on crystalline materials deal with ion conduction in Li, Na, Ag, Tl, F and O-containing compounds. Materials and device aspects have received wide coverage, especially the areas of lithium ion batteries (LIBs) and solid oxide fuel cells (SOFCs).Rechargeable high energy density LIBs, especially those employing immobilized gel or polymer electrolyte, are the favorite portable power sources in the new millennium. As expected, a large number of papers on both cathodes and polymer electrolytes for LIBs were presented at the conference. The papers on fuel cells almost exclusively deal with SOFCs, indicating the great importance being given to this area in Japan and China. A breakthrough in materials and technology of SOFC is expected in the coming decade. This volume will be useful not only to the active researchers in the field but also to youngsters entering the exciting area of solid state ionics.

Nanotechnology Driven Engineered Materials

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Author : Sabu Thomas
language : en
Publisher: CRC Press
Release Date : 2018-09-03

Nanotechnology Driven Engineered Materials written by Sabu Thomas and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-03 with Science categories.

Nanostructured materials are emerging as a new class of materials that exhibit unique microstructures and enhanced mechanical performance. As an outcome of this, these materials have attracted considerable attention in scientific communities all over the world. There is continuous research to facilitate product development, thereby improving product quality and reliability in industry. This volume is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. Special emphasis is given to new applications of nanostructures and nanocomposites in various fields, such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine. The chapters are divided into sections focusing on: Nanoparticles Assembly and Nanostructured Materials Nanocomposites Properties Nanostructured Materials for Biomedical Applications

Immittance Spectroscopy

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Author : Mohammad A. Alim
language : en
Publisher: John Wiley & Sons
Release Date : 2017-12-12

Immittance Spectroscopy written by Mohammad A. Alim and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-12 with Science categories.

This book emphasizes the use of four complex plane formalisms (impedance, admittance, complex capacitance, and modulus) in a simultaneous fashion. The purpose of employing these complex planes for handling semicircular relaxation using a single set of measured impedance data (ac small-signal electrical data) is highly underscored. The current literature demonstrates the importance of template version of impedance plot whereas this book reflects the advantage of using concurrent four complex plane plots for the same data. This approach allows extraction of a meaningful equivalent circuit model attributing to possible interpretations via potential polarizations and operative mechanisms for the investigated material system. Thus, this book supersedes the limitations of the impedance plot, and intends to serve a broader community of scientific and technical professionals better for their solid and liquid systems. This book addresses the following highlighted contents for the measured data but not limited to the:- (1) Lumped Parameter/Complex Plane Analysis (LP/CPA) in conjunction with the Bode plots; (2) Equivalent circuit model (ECM) derived from the LP/CPA; (3) Underlying Operative Mechanisms along with the possible interpretations; (4) Ideal (Debye) and non-ideal (non-Debye) relaxations; and (5) Data-Handling Criteria (DHC) using Complex Nonlinear Least Squares (CNLS) fitting procedures.

Solid State Ionics

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Author : B. V. R. Chowdari
language : en
Publisher: World Scientific
Release Date : 2000

Solid State Ionics written by B. V. R. Chowdari and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Technology & Engineering categories.

Solid atate ionics, being a multidisciplinary area, is expected to grow at a faster rate in the new millennium, prompting the discovery of new materials and devices, as well as helping to optimize the known devices, especially the portable power sources and display systems. The Asian Society for Solid State Ionics (ASSSI) plays a significant role in bringing together researchers from the Asian countries, every two years, to exchange notes and ideas, to foster friendship and collaboration, and to discuss the prospects. The topics covered in this volume are: ion dynamics, theoretical modeling, ion-conducting polymers, gels and ceramics, glasses, crystalline materials including nano-phases, composites, electrode/electrolyte interfaces and novel experimental techniques. Papers on crystalline materials deal with ion conduction in Li, Na, Ag, Tl, F and O-containing compounds. Materials and device aspects have received wide coverage, especially the areas of lithium ion batteries (LIBs) and solid oxidefuel cells,(SOFCs). Rechargeable high energy density LIBs, especially those employing immobilized gel or polymer electrolyte, are the favorite portable power sources in the new millennium. As expected, a large number of papers on both cathodes and polymer electrolytes for LIBs were presented at the conference. The papers on fuel cells almost exclusively deal with SOFCs, indicating the great importance being given to this area in Japan and China. A breakthrough in materials and technology of SOFC is expected in the coming decade. This volume will be useful not only to the active researchers in the field but also to youngsters entering the exciting area of solid state ionics.

Proceedings Of The Sixth International Symposium On Electrode Processes

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Author : Andrzej Więckowski
language : en
Publisher: The Electrochemical Society
Release Date : 1996

Proceedings Of The Sixth International Symposium On Electrode Processes written by Andrzej Więckowski and has been published by The Electrochemical Society this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Science categories.

Ceramic Materials And Multilayer Electronic Devices

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Author : K. M. Nair
language : en
Publisher: John Wiley & Sons
Release Date : 2012-04-11

Ceramic Materials And Multilayer Electronic Devices written by K. M. Nair and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04-11 with Technology & Engineering categories.

This volume contains a collection of 40 papers from two symposia: Advanced Dielectric Materials and Multilayer Electronic Devices and High Strain Piezoelectric Materials, Devices and Applications. Topics include fundamental and historical perspectives of dielectric materials; relaxor materials and devices; high strain piezoelectric devices; advanced aspects of powder preparation, characterization, and properties; thin films; materials for low and high frequency applications; processing-structure-property-relationships; and future applications. Proceedings of the symposium held at the 105th Annual Meeting of The American Ceramic Society, April 27-30, 2003, in Nashville, Tennessee; Ceramic Transactions, Volume 150.