Results 291 to 300 of about 135,801 (323)

Anomalous relaxation and dielectric response

Physical Review E, 2007
It is shown that all the known experimental (quasi)stationary dielectric response functions of glassy media can be derived from a standard generalized Langevin description of overdamped torsional dipole oscillators in trapping potentials with random orientations under some minimal assumptions.
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Dielectric relaxation in hydroxypolyesters

J. Mater. Chem., 1991
Dielectric spectra of a hydroxypolyester (I) and an imide-modified hydroxypolyester (II) are presented. In both cases two clearly defined zones of relaxation are shown. At the high-temperature side of the spectrum the α relaxation zone is produced by micro-Brownian motion of the main backbone and by free charges, and below room temperature, a complex β
Enrique Sanchez Martínez, Ricardo Diaz Calleja, Klaus Wilhelm Lienert   +2 more
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Dielectric relaxation in eugenol

Journal of the Chemical Society, Faraday Transactions 2, 1976
The dielectric behaviour of eugenol has been determined over the temperature range 23.5 to –69°C; this range is similar to that used in a previous investigation of the viscoelastic properties. It is found that all the dielectric relaxation data could be reduced to a single curve which could be fitted by a Davidson–Cole equation with the distribution ...
Turhan Alper, A. John Barlow, Min G. Kim
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Dielectric relaxation and dielectric mixtures: similarities

CEIDP '05. 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2005., 2005
Spectral density representation is a tool to analyze electrical properties of material mixtures and the geometrical description of the system. The aim of this paper is to derive an expression for the spectral density representation, which favors dielectric relaxation phenomenon.
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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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Dielectric relaxation in distributed dielectric layers

Journal of Applied Physics, 1984
The Maxwell–Wagner theory of interfacial polarization was extended to the layer system in which the layer properties are distributed continuously. The equation was derived to transform the distribution of relaxation times into that of layer properties. Each layer was characterized by the thickness and by the time constant which is defined as the ratio ...
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Dielectric Relaxation in Alkylcyanides

The Journal of Chemical Physics, 1964
The values of ε′ and ε″ have been measured for pure methyl, ethyl, n-propyl and n-butyl cyanides at 1.0 Mc/sec, 9.95, 20.8, and 32.0 kMc/sec. The relaxation time and the distribution parameters have been calculated from Cole-Cole plots. The value of dielectric relaxation time increases from methyl to n-butyl cyanides (3.8, 4.7, 6.2, 7.5×10—12 sec at 30°
null Krishnaji, Abhai Mansingh
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Dielectric relaxations in Dy2O3

physica status solidi (a), 1985
The frequency variation of the real and imaginary parts of dielectric constant, e′ and e″, of coldpressed and sintered nominally pure dysprosium oxide (Dy2O3) is investigated at a fixed temperature of 300 K over a frequency range of 1.0 to 150 kHz.
N. Ch. Mitra, A. L. Bhattacharyya
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Proton relaxation in dielectrics

Russian Physics Journal, 1998
A kinetic equation is found which is written taking account of tunneling transitions for proton relaxation with a potential shape represented by a multiwell model having parabolic barriers. Study of the solution allows one to establish the proton relaxation mechanism in dielectrics and calculate the complex dielectric constant.
M. G. Tonkonogov, T. A. Kuketaev, Zh. T. Ismailov, K. K. Fazylov   +3 more
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Dielectric relaxation of polydimethylsiloxane

Journal of Polymer Science: Polymer Physics Edition, 1979
AbstractDielectric studies were performed on crystallized and amorphous polydimethylsiloxane which had been characterized by differential thermal analysis and polarized light microscopy. The crystallized specimen displayed one relaxation near 160 K at 1 kHz while the amorphous specimen showed absorption peaks at 155 and 165 K.
Hiroshi Adachi, Keiichiro Adachi, Yoichi Ishida, Tadao Kotaka   +3 more
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