Author: Adlai Bishay Publisher: Springer Science & Business Media ISBN: 1468430211 Category : Technology & Engineering Languages : en Pages : 423
Book Description
If an ion in a crystal is replaced by an impurity ion with a different charge, compensation for the charge difference must be accomplished. This is usually done by an intrinsic defect, i. e. a lattice vacancy or interstitial host ion, in such a way to balance the excess or deficit of charge. The introduction of cation vacan cies along with divalent cation impurities in alkali halides is a familiar example. If these crystals are carefully annealed, nearly all of the compensating defects migrate to the impurity ions to form impurity-defect complexes. It is the behavior of these complexes that are the principal concern in this paper. Almost invariably such complexes are dipolar in character, and when subjected to an electric or mechanical stress field, they will tend to realign to an orienta tion of lower energy provided the thermal activation is sufficiently great. If the complex consists of an impurity-vacancy couple, re orientation may occur either by the vacancy moving around the impu rity or by an exchange of positions of the partners. In general the activation energy for these two distinct reorientation paths is different. If the complex consists of an impurity-interstitial couple, interchange of positions is unlikely and reorientation is considered to occur exclusively by the motion of the interstitial around the vacancy.
Author: Wojciech (Voytek) Gutowski Publisher: CRC Press ISBN: 9004201742 Category : Science Languages : en Pages : 374
Book Description
The surface of an object is the first thing we see or touch. Nearly every article or object we encounter at home, in industry, land transportation, aerospace, or the medical field in some way uses an adhesive, a sealant, or a decorative coating. Adhesion science provides the technology and the know-how behind these applications. Recent Advances in
Author: Utpal S. Joshi Publisher: Trans Tech Publications Ltd ISBN: 3038262781 Category : Technology & Engineering Languages : en Pages : 251
Book Description
Selected, peer reviewed papers from the National Symposium on Advances in Materials Science and Technology (AMST-2012), February 3-4, 2012, Ahmedabad, India
Author: Maryann C. Wythers Publisher: ISBN: 9781685073718 Category : Technology & Engineering Languages : en Pages : 0
Book Description
This volume includes six chapters and presents some of the latest advancements in materials science research. Chapter One describes the structural characterization, the polyelectrolyte properties and the proton dynamics of imidazole-based materials, with special emphasis on the application for proton conductors, gene delivery systems, pollutant adsorbents, fluorescent sensors and OLED technologies. Chapter Two details various characteristics of polyethylene terephthalate fiber. Chapter Three explains the foundation of photonic crystals from one-dimension to higher-order and introduces topological ideas in photonic crystals. Chapter Four includes research on production, properties and applications of polyethylene terephthalate. Chapter Five explores the potential application of antimonene as an anode material in sodium-ion batteries. Finally, Chapter Six summarizes recent advances on the role of fullerene additions for structural behaviors of thermoplastic matrices.
Author: Nishu Gupta Publisher: CRC Press ISBN: 1040133924 Category : Computers Languages : en Pages : 640
Book Description
The advances in technology, engineering and science are necessary for better and sustailable life. It is not only beneficial for human growth but equally important for all the living and non living matters on the planet. Hence it is imperative to come togather and share the knowledge, innovations and developments in the technology and science happening around. The objective of 1st International Conference on “Recent Advances in Science, Engineering & Technology” (ICRASET-2023) was to provide platform to share various hypotheses, conclusions, and discoveries from students, researchers, professors, and industry experts. The conference was associated with the knowledge partners like ASM International, IEEE, IETE, ISTE, CSI and IE
Author: Mulatu Liyew Berihun Publisher: Springer Nature ISBN: 3030937127 Category : Computers Languages : en Pages : 600
Book Description
This two-volume set of LNICST 411 and 412 constitutes the refereed post-conference proceedings of the 9th International Conference on Advancement of Science and Technology, ICAST 2021, which took place in August 2021. Due to COVID-19 pandemic the conference was held virtually. The 80 revised full papers were carefully reviewed and selected from 202 submissions. The papers present economic and technologic developments in modern societies in 7 tracks: Chemical, Food and Bioprocess Engineering; Electrical and Electronics Engineering; ICT, Software and Hardware Engineering; Civil, Water Resources, and Environmental Engineering ICT; Mechanical and Industrial Engineering; Material Science and Engineering; Energy Science, Engineering and Policy.
Author: Seung-Bok Choi Publisher: ISBN: 9781634825740 Category : Actuators Languages : en Pages : 318
Book Description
In the last two decades, a great effort has been directed towards the development of new smart materials actuators and their corresponding application devices and systems. Currently, some smart materials actuators are commercially applied for several technologies including automotive technology, but some of the smart materials actuators are still far from meeting strict practical requirements such as reliability, cost-effectiveness and robustness against unexpected environment conditions. Therefore, it is timely and appropriate to present recent research on smart materials actuators in terms of material characterization and advanced application systems in a single book. This book describes smart materials actuator technology from materials characterizations to device or system applications. The smart materials introduced in this book include magnetorehological fluid (MRF), magnetorheological elastomer (MRE), electrorheological fluid (ERF), piezoelectric material (PM), shape memory ally (SMA), dielectric elastomer (DE) and ionic polymer (IP). Both physical and chemical characterizations of each smart material are described in details in terms of actuating aspect. In addition, several application devices utilizing each smart material are introduced to provide practical controllability as a potential candidate for new actuators. The application devices introduced in this book include MRF damper for automotive suspension, PM unimorph pump for micro-hydraulic system, MRE flexible structure for vibration control, IP biomimetic micro-robot and SMA civil structure and damper system for vibration attenuation.
Author: Maryann C. Wythers Publisher: ISBN: 9781536150384 Category : Languages : en Pages : 0
Book Description
Advances in Materials Science Research. Volume 37 begins by discussing the main properties of poly (methyl methacrylate) bone cements used for orthopaedic surgery. In particular, emphasis is given to the fillers used to modify the solid phase of acrylic formulations, and this strategy is related to changes in their mechanical, biological, and clinical properties. Following this, the authors describe studies on the radiopaque agents of bone cements from 1960 to today. This research is divided into several time frames: 1960-1990, 1990-2000, 2000-2010, and 2010-2018. An outlook for the future studies is also provided. A recent literature analysis in the field of spray pyrolysis production methods is presented, including the respective equipment requirements and the versatility of the materials. Examples of the application of ultrasonic spray nebulizers, laser and plasma atomizers are also provided. Next, a facile spray pyrolysis from a precursor solution with an ammonium additive is introduced to prepare porous nanostructured vanadium pentoxides. The correlation between porous structures and electrochemical properties of the PN-V2O5 electrodes was systematically investigated on rechargeable lithium batteries. Furthermore, some challenges are presented on the design of porous materials produced by spray pyrolysis for the application of lithium sulfur batteries. The authors discuss research on non-contact and non-destructive systems that excite surface acoustic waves using pulsed lasers and detect surface acoustic waves using laser Doppler detectors to observe the changes in the physical properties of the substrate surface. The concluding study focuses on the availability of modified epoxidized palm oil as pressure sensitive adhesives in medical applications. Epoxidized palm oil has been modified to two modifications of acrylation and maleination. Thus, there are requirements need to be met for pressure sensitive adhesive formulation before the curing process.
Author: National Research Council Publisher: National Academies Press ISBN: 0309039282 Category : Technology & Engineering Languages : en Pages : 322
Book Description
Materials science and engineering (MSE) contributes to our everyday lives by making possible technologies ranging from the automobiles we drive to the lasers our physicians use. Materials Science and Engineering for the 1990s charts the impact of MSE on the private and public sectors and identifies the research that must be conducted to help America remain competitive in the world arena. The authors discuss what current and future resources would be needed to conduct this research, as well as the role that industry, the federal government, and universities should play in this endeavor.
Author: Adlai Bishay
Author: Wojciech (Voytek) Gutowski
Author: Utpal S. Joshi
Author: Maryann C. Wythers
Author: Nishu Gupta
Author: Mulatu Liyew Berihun
Author: Seung-Bok Choi
Author: Carmen Galassi
Author: Maryann C. Wythers
Author: National Research Council