Dielectric Materials And Electrostatics

An introduction to the physics of electrical insulation, this book presents the physical foundations of this discipline and the resulting applications. It is structured in two parts. The first part presents a mathematical and intuitive approach to dielectrics; various concepts, including polarization, induction, forces and losses are discussed. The second part provides readers with the keys to understanding the physics of solid, liquid and gas insulation. It comprises a phenomenological description of discharges in gas and its resulting applications. Finally, the main electrical properties of liquids and solids are presented, in order to explain the phenomena of electrical degradation, dissipation and breakdown. Contents 1. Mathematical Examination of Dielectrics 2. Physical Examination of Dielectrics Appendix 1. List of Figures Appendix 2. List of Symbols Appendix 3. List of Useful Values Appendix 4. Reminder about Dielectric Spectroscopy Appendix 5. Reminder about Transitory Currents

Electrostatics and dielectric materials have important applications in modern society. As such, they require improved characteristics. More and more equipment needs to operate at high frequency, high voltage, high temperature, and other harsh conditions. This book presents an overview of modern applications of electrostatics and dielectrics as well as research progress in the field.

This book provides an overview of key dielectric materials for capacitor technology. It covers preparation and characterization of state-of-the art dielectric materials including ceramics, polymers and polymer nanocomposites, for popular applications including energy storage, microwave communication and multi-layer ceramic capacitors.

Electrostatic stresses are a fascinating field where materials science, continuum mechanics and electrical engineering all come together. This is one of the reasons why the study of these so-called Maxwell stresses is so interesting.

An accurate quantitative picture of electric field distribution is essential in many electrical and electronic applications. In composite dielectric configurations composed of multiple dielectrics, anomalous or unexpected behavior of electric fields may appear when a solid dielectric is in contact with a conductor or another solid dielectric. The electric field near the contact point may become higher than the original field not only in the surrounding medium but also in the solid dielectric. Theoretically it may become infinitely high, depending on the contact angle. Although these characteristics are very important in a variety of applications, they have been clarified only recently using analytical and numerical calculation methods, and this is the first book to cover these new findings. Electric Fields in Composite Dielectrics and Their Applications describes the fundamental characteristics and practical applications of electric fields in composite dielectrics. The focus is on the field distribution (and the resultant force when appropriate) near points of contact. Applications include insulation design of high-voltage equipment with solid insulating supports, utilization of electrostatic force on dielectric particles in electrophotography and electrorheological fluids, and others. Electric Fields in Composite Dielectrics and Their Applications also explains the calculation methods used to analyze electric fields in composite dielectrics.

Examines the influences of electric fields on dielectric materials and explores their distinctive behavior through well established principles of physics and engineering and recent literature on dielectrics. Facilitates understanding of the space charge phenomena in the nonuniform fields. Contains more than 800 display equations.

This is the first of two papers in which an attempt is made to clarify the standard theories of dielectrics and of permeable materials, and in particular, to clarify the meanings of D and H, two vectors that are frequently defined unsatisfactorily in the literature. It is intended to introduce certain well-defined postulates, and then to show that these postulates are equivalent to the implicit and sometimes camouflaged assumptions that underlie the usual treatments. This first article treats dielectrics and D; a later one will treat permeable matter and H. (Author).