Dielectric Properties of Porous Media (Springer Series in Materials Science, 59)

This monograph systematically presents the fundamentals of theoretical and experimental research into the most important physical characteristics of porous structures. Non-standard behavior of certain physical parameters, such as the breakdown of the electric field of porous substances, is described. The method of calculation of the thermal conductivity coefficient of porous dielectrics, based on the non-equilibrium principle, is illustrated in detail. The present approach may be applied to the investigation of the properties of "disparate" substances such as cellulose matrices, composites, and fibrous structures. The book is intended for physicists, physical chemists and materials scientists at research and postgraduate and undergraduate levels. It may also be helpful for engineers and technical workers in the applied sciences. This monograph is the?rst systematic presentation of the theoretical fun- mentals of the physics of porous structures and it is intended for basic fa- liarization with the subject. That is why we tried to avoid, where possible, excessive mathematics and to pay as much attention to the visual presen- tion of the general physical picture of various phenomena as possible. Even in those cases where there is an accurate mathematical theory we avoid ri- rous mathematical proofs, assuming that the reader is acquainted with the fundamentals of quantum mechanics and statistical physics and in particular cases will be able to reproduce the calculations of interest. For a more detailed and sound study of particular problems the reader may refer to the original papers and monographs listed at the end of the book. The book includes?ve chapters. The?rst chapter deals with the model of porous medium based on the notion of the?bril structure of substance which allows us theoretically analyze some seemingly “desperate” problems. Moreover, included in this chapter is some information from the thermo- namics of equilibrium systems. The second chapter deals with a number of issues connected with the investigation of purely equilibrium characteristics of such structures, including heat capacity and mechanical strength. Ch- ter 4 concerns the physical bases of fast processes in porous media. Chapter 5 shows the development of a consistent theory of heat conduction in porous substances.

This monograph systematically presents the fundamentals of theoretical and experimental research into the most important physical characteristics of porous structures. Non-standard behavior of certain physical parameters, such as the breakdown of the electric field of porous substances, is described. The method of calculation of the thermal conductivity coefficient of porous dielectrics, based on the non-equilibrium principle, is illustrated in detail. This approach is then applied to the investigation of the properties of "disparate" substances such as cellulose matrices, composites, and fibrous structures. The book is intended for physicists, physical chemists and materials scientists at research and postgraduate levels; it may also be helpful to engineers and technical workers in the applied sciences.

Front Matter....Pages I-XIII Introduction....Pages 1-4 Model of the Internal Structure of a Porous Dielectric....Pages 5-30 Equilibrium Physical Parameters of Porous Dielectrics....Pages 31-59 The Theory of Fast Nonstationary Phenomena in Porous Dielectrics....Pages 61-114 On Specific Features of Thermal Conduction and Diffusion in Porous Dielectrics....Pages 115-170 Behavior of Porous Dielectrics in Acoustic and Electromagnetic Fields....Pages 171-213 Conclusion....Pages 215-215 Back Matter....Pages 217-264 Model of the Internal Structure of a Porous Dielectric Equilibrium Physical Parameters of Porous Dielectrics The Theory of Fast Nonstationary Phenomena in Porous Dielectrics On Specific Features of Thermal Conduction and Diffusion in Porous Dielectrics Behaviour of Porous Dielectrics in Acoustic and Electromagnetic Fields.