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Taylor & Francis
Dielectrics in Electric Fields, Second Edition / Edition 2

Dielectrics in Electric Fields, Second Edition / Edition 2

by Gorur Govinda Raju


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Product Details

ISBN-13: 9781482231137
Publisher: Taylor & Francis
Publication date: 05/12/2016
Pages: 796
Product dimensions: 7.00(w) x 10.00(h) x (d)

About the Author

Gorur Govinda Raju holds a B.Eng from the University of Bangalore (India) and a Ph.D from the University of Liverpool (UK). He joined the University of Windsor (Ontario, Canada) in 1980 and became professor and head of the Electrical and Computer Engineering Department during 1989–97 and 2000–2002. He has been on the board and program committee of the IEEE Conference on Electrical Insulation and Dielectric Phenomena for many years, and is currently a lifetime emeritus professor at the University of Windsor. Professor Raju has been an electrical power and dielectric phenomena consultant to the government of India, Detroit Edison Co., and several other organizations. He has published four engineering books, a novel, and more than 150 papers in international journals and conference proceedings. His experimental and theoretical contributions to gaseous electronics and dielectric phenomena continue to be cited in numerous research papers.

Table of Contents

Introductory Concepts
A Dipole
The Potential Due to a Dipole
Dipole Moment of a Spherical Charge
The Laplace Equation
The Tunneling Phenomenon
Band Theory of Solids
Energy Distribution Function
The Boltzmann Factor
A Comparison of Distribution Functions
Concluding Remarks

Polarization and Static Dielectric Constant
Polarization and Dielectric Constant
Electronic Polarization
The Internal Field
Orientational Polarization
Debye Equations
Experimental Verification of Debye Equation
Spontaneous Polarization
Onsager Theory
Theory of Kirkwood
Dielectric Constant of Two Media
The Dissipation Factor
Dielectric Constant of Liquid Mixtures
Effect of High Electric Fields
Atomic Polarizability
Additional Comments on Static Dielectric Constant
Concluding Remarks

Dielectric Loss and Relaxation—I
Complex Permittivity
Polarization Buildup
Debye Equations
Bistable Model of a Dipole
Complex Plane Diagram
Cole–Cole Relaxation
Dielectric Properties of Water
Davidson–Cole Equation
Macroscopic Relaxation Time
Molecular Relaxation Time
Straight-Line Relationships
Fröhlich’s Analysis
Fuoss–Kirkwood Equation
Havriliak and Negami Dispersion
Dielectric Susceptibility
Distribution of Relaxation Times
Kramers–Kronig Relations
Loss Index and Conductivity
Additional Comments
Concluding Remarks

Dielectric Loss and Relaxation—II
Jonscher’s Universal Law
Cluster Approach of Dissado and Hill
Equivalent Circuits
Interfacial Polarization
The Absorption Phenomenon
Frequency Dependence of ε*
Dielectric Spectra of Engineering Importance
Concluding Remarks

Experimental Data (Frequency Domain)
Introduction to Polymer Science
Nomenclature of Relaxation Processes
Nonpolar Polymers
Polar Polymers
Scaling Methods
Concluding Remarks

Absorption and Desorption Currents
Absorption Current in a Dielectric
Hamon’s Approximation
Distribution of Relaxation Time and Dielectric Function
The Williams–Watts Function
The G (τ) Function for Williams–Watts Current Decay
Experimental Measurements
Commercial Dielectrics
Miscellaneous Polymers
Concluding Remarks

Inorganic Dielectrics
Alumina (Al2O3)
Barium Titanate (BaTiO3)
Barium–Strontium–Titanate (BST)
Carborundum (SiC)
Microwave Ceramics
Silicon Dioxide (SiO2)
High-ε and Low-ε Materials
Concluding Remarks

Microwave Measurement Methods
Microwave Measurements
Resonance and Standing Wave Techniques
Transmission/Reflection Techniques
Broadband Measurements
Concluding Remarks

Dielectrics in Allied Disciplines
Alternative Representation of Dielectric Parameters
Impedance Spectroscopy of Fuel Cells
Impedance Spectra in Medical Science
Impedance Spectroscopy for Corrosion Studies
Dielectric Measurements in Agricultural Sciences
Applications in Electrorheology
Applications in Civil Engineering
Concluding Remarks

Field-Enhanced Conduction
Some General Comments
Motion of Charge Carriers in Dielectrics
Ionic Conduction
Charge Injection into Dielectrics
Space Charge Phenomenon in Nonuniform Fields
Conduction in Selected Polymers
Numerical Computation
More Recent Publications
Closing Remarks

Selected Aspects of Gaseous Breakdown
Collision Phenomena
Electron Growth in an Avalanche
Criteria for Breakdown
Paschen’s Law
Breakdown Time Lags
The Streamer Mechanism
Field Distortion Due to Space Charge
Sparkover Characteristics of Uniform Field Gaps in SF6
Sparkover Characteristics of Long Gaps
Breakdown Voltages in Air with Alternating Voltages
Modeling of Discharge Phenomena
Streamer Formation in Uniform Fields
The Corona Discharge
Basic Mechanisms: Negative Corona
Basic Mechanisms: Positive Corona
Modeling of Corona Discharge: Continuity Equations
Nonequilibrium Considerations
Monte Carlo Simulation: Negative Corona in SF6
Monte Carlo Simulation: Positive Corona in SF6
Breakdown in Microscale Gaps
Concluding Remarks

High-Field Conduction and Breakdown in Liquids
High-Field Conduction
Breakdown Mechanisms
Partial Discharges
Crossed Magnetic Field Effects
Concluding Remarks

Breakdown in Solid Dielectrics
Electrons in Solids
Electronic Theory of Breakdown
Theory of Von Hippel
Boggs’ Computations
Thermal Breakdown
Water Treeing
Breakdown in Commercial Polymers
The Weibull Distribution
Area Effects in High-Temperature Polymers
Breakdown Studies in Selected Materials
Miscellaneous Materials

Thermally Stimulated Processes
Traps in Insulators
Current Due to Thermally Stimulated Depolarization (TSD)
TSDC for Distribution of Activation Energy
TSDCs for Universal Relaxation Mechanism
TSDCs with Ionic Space Charge
TSDCs with Electronic Conduction
TSDCs with Corona Charging
Compensation Temperature
Methods and Analyses
TSD and Alternating Current Dielectric Properties
Concluding Remarks

Space Charge in Solid Dielectrics
The Meaning of Space Charge
Polarons and Traps
A Conceptual Approach
The Thermal Pulse Method of Collins
DeReggi’s Analysis
Laser Intensity Modulation Method (LIMM)
Pressure Pulse Method
Experimental Results
More Recent Literature
Closing Remarks

Materials: General Comments
Polythene and Selected Nanomaterials
Poly(vinylidene fluoride) Nanocomposites
Poly(vinyl alcohol) and Nanocomposites
Epoxy Resin Nanocomposites
Polyamide and Polyimide Nanocomposites
Selected Polymer Nanocomposites
Nanodielectrics in the Power Industry
Space Charge Phenomena in Nanocomposites
Breakdown in Nanodielectrics
Concluding Remarks


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