Electrostatic effects have been known since ancient times but only with the discovery of the electron in the present century has an adequate theory started to develop to explain them. There is now renewed interest in the subject caused by the need to understand the electrostatic causes of explosions, and industrial applications such as electrostatic powder coating and photocopying. This book provides a comprehensive study of the cause and effects of charge accumulation in solids and liquids. The basic theory of electrostatics is presented at the beginning of the book and all the applications and problems which are subsequently described can be understood using this. For those readers who wish a higher-level treatment the final chapter is devoted to more advanced theory and covers, for example, solutions of Laplace's equation and Earnshaw's theorem. The bulk of the book covers the applications of electrostatics. There is a treatment of the electrification of solids and liquids, including corona and induction charging, followed by a chapter on measurement and instrumentation. There are many industrial applications of electrostatic effects, for example in pollution control and metal finishing, and these areas are covered comprehensively. On the other hand, electrostatics can be a problem causing, for example, excessive wear due to electrostatic adhesive forces. These areas are also fully discussed. Extensive references are given, to enable readers who wish to study one particular aspect in greater depth to pursue the subject further. Little calculus is used so that this book will be readily understood by engineers and scientists of any discipline. As such, it is an accessible, as well as a comprehensive, source of reference to everyone concerned with electrostatics.
Sprache
Verlagsort
Verlagsgruppe
Zielgruppe
Für höhere Schule und Studium
Für Beruf und Forschung
ISBN-13
978-0-85274-589-2 (9780852745892)
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Schweitzer Klassifikation
Historical background and elementary theory: Historical background. Fundamental definitions. Orders of magnitude. Summary of electrostatic equations in uniform fields. Gauss's law - the electric field due to an assembly of charges. Electrification of solids and liquids: Contact and frictional charging. Corona charging. Charging by capture of small particles. Induction charging. Double-layer charging. References. Measurements and instrumentation: Introduction. Potential dividers and resistance probes. Electrometers and electrostatic voltmeters. Field meters and non-contacting voltmeters. Charge measurement - the Faraday cup. Measurement of the charge and mobility of individual particles. Field and potential probes. The use of the Kerr and Pockels effect for measurement of electric fields. Capacitance meters. Measurement of resistance and resistivity. Energy of electrostatic sparks. Electrostatics in gas filtration: Introduction. Electrostatic precipitation. Electron beam desulphurisation and denitrisation. Electrostatically enhanced cyclone separators. Electrostatic scrubbers and granular bed filters. Electrostatically enhanced fabric filters. Appendix. Miscellaneous applications: Electrostatic atomisation. Electrostatic spray coating. Electrostatic separation. Electrokinetic phenomena in liquids. Dielectrophoresis. Applications of the corona discharge. Electrodynamic containment and control of particles. Applications of electromechanical forces. Electrostatic copying. Electrostatics and the textile industry. Electrostatic crystals. Electrostatic generators. Hazards and problems: Fire and explosion hazards. Electrostatic sparks. Non-electrostatic sparks. Electrostratic eliminators. Antistatic agents. Electrostatic problems in the electronics industry. Adhesion. Appendix. Theory: Fundamental laws of electrostatics. Capacitance and capacitors. Polarisation. Identification of field lines and equipotentials. Electric field and potential by solution of Laplace's equation. Earnshaw's theorem. Corona discharge theory. Appendix. Index.
