Results 251 to 260 of about 52,617 (307)

On the Theory of Dielectric Polarization in Liquids

Nature, 1939
ONSAGER1 has developed a theory of the dielectric polarization in liquids, in many respects different from the current theory of Lorentz-Debye. We propose to show that the method of calculating the dipole energy, used by Onsager in his theory, does not correspond exactly to the assumptions of this theory.
Zakrzewski, K., Piekara, A.
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Polarization diffusion and dielectric friction in polar liquids. II

Chemical Physics, 1984
Abstract We introduce a new mechanism for collective polarization dynamics in a polar liquid. This continuum model couples hydrodynamic motions of the liquid to dielectric relaxation by both rotational and translational diffusion of polar molecules.
P.J. Stiles, J.B. Hubbard
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The Dielectric Polarization of Polar Liquids

The Journal of Chemical Physics, 1939
An extension of the Onsager theory of dielectric polarization is presented. The local dielectric constant is approximated by the macroscopic dielectric constant of the fluid in a region outside a molecule and its first shell of neighbors rather than in the entire region exterior to the molecule.
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Macroscopic polarization in crystalline dielectrics

Journal of Molecular Structure: THEOCHEM, 2004
The concept of macroscopic polarization is the basic one in the electrostatics of dielectric materials: but for many years this concept has evaded even a precise microscopic definition, and has severely challenged quantum-mechanical calculations. This concept has undergone a genuine revolution in recent years (1992 onwards). It is now pretty clear that
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Polarization in rotating dielectrics

Journal of Colloid and Interface Science, 1984
Abstract The theory of the polarization in rotating dielectric bodies, subjected to time-varying electric fields, is presented. Particular attention is given to particles rotating about a single axis. Steady rotation and random rotation (rotational Brownian motion) are considered.
H Block, E Kluk, J McConnell, B.K.P Scaife   +3 more
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Anomalous Polarization Current in Dielectrics

Physica Status Solidi (a), 1984
The isothermal polarization current in polar dielectrics with simultaneous accumulation of a near-electrode space charge is considered. Assuming an exponential kinetics of the electric counter-field formation, an analytical expression for polarization current is obtained. An anomaly of the current course is discussed in detail.
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Dielectric Relaxation in Disordered Polar Dielectrics

Ferroelectrics, 2002
A review of the current understanding of the effect of crystal lattice defects on the low-frequency dielectric relaxation properties in single crystals and polycrystalline polar dielectrics is given. Special attention is paid to different long-term phenomena, found in dielectric experiments, such as a low frequency relaxation polarization, a very slow ...
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The permittivity of polar dielectrics

Russian Journal of Physical Chemistry A, 2007
The best known works on the theory of permittivity of polar dielectrics are considered. Equations are obtained that relate the dipole moment of a molecule in a medium to substance permittivity and can be used in calculations of the polarization characteristics of rarefied gases and condensed polar dielectrics.
N. M. Putintsev, D. N. Putintsev
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A theory of the dielectric polarization of polar substances

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1956
Abstract With the aid of classical statistical mechanics, a general expression for the static dielectric constant is derived. It is found, as in earlier work, that the dielectric constant is dependent upon the mean-square dipole moment of a macroscopic spherical sample of the substance.
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Spontaneous Polarization Noise in Polar Dielectrics

Journal of Applied Physics, 1964
The spontaneous fluctuations of polarization in polar dielectrics are considered by using the Einstein thermodynamic method, a general dielectric theory method, and an equivalent circuit method. Mean-square fluctuation of the polarization field is obtained by the first two methods and the frequency spectrum by use of the dispersion properties.
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