Results 261 to 270 of about 54,579 (314)

Intrinsic dielectric loss in crystals

Advances in Physics, 1991
Abstract We review the current theory of intrinsic dielectric loss, that is the loss in a perfect crystal due to anharmonic interaction of a.c. electric field with the phonon system of the crystal. Both ordinary dielectrics and displacive ferroelectrics are considered. The theory predicts dependence of the loss on frequency ω and temperature T.
V.L. Gurevich, A.K. Tagantsev
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Low-loss percolative dielectric composite

Applied Physics Letters, 2005
In this letter, we report a modified percolative polymer composite that has a low dielectric loss (tanδ∼0.02@10KHz, comparable to that of the polymer matrix), a high dielectric constant (k>100@10KHz, about 30 times higher than that of the polymer matrix), and a low frequency dependence.
Jianwen Xu, C. P. Wong
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Dielectric losses in As2Se3 glass

Solid State Communications, 1971
Abstract Dielectric loss measurements on As 2 Se 3 glass samples at room temperature in the frequency region 10 2 – 10 10 Hz show losses considerable smaller than published values. Definite evidence for localized states was not found. An upper limit of 2 × 10 18 /cm 3 eV for the density of states at the Fermi level follows from these experiments.
C. Crevecoeur, H.J. de Wit
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Dielectric Polarization and Loss

Annual Review of Physical Chemistry, 1960
The subject of dielectric behavior has not previously been dealt with as such in these reviews, although dielectric properties relevant to other sub­ jects have often been mentioned. There have, however, been a number of comparatively recent books and review articles on various aspects of di­ electrics.
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The Dielectric Losses in Impregnated Paper

Transactions of the American Institute of Electrical Engineers, 1933
Accurate measurements have been made of the electrical and other physical properties of 10 insulating oils, of a single grade of wood pulp paper, and of the paper when impregnated with each of the oils. Short time charge and discharge curves under continuous potential have thrown further light on the anomalous conduction as found in oils, and permit ...
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Dielectric Loss of Polymer Nanocomposites and How to Keep the Dielectric Loss Low

2016
An efficient utilization of polymer nanocomposites as dielectrics requires a comprehensive knowledge of the dielectric loss behavior in a time-varying field to avoid unnecessary energy loss and insulation failure due to thermal instability. It was indicated that losses from the molecular dipole relaxation and the charge carrier propagation predominate ...
Yanhui Huang, Xingyi Huang
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Ultra Low Loss Ceramic Dielectrics

Journal of the American Ceramic Society, 1959
The object of this research was to develop ultra low loss ceramic dielectrics. The possible causes of the dielectric loss of ceramic bodies were first analyzed theoretically. Experimental bodies, designed on the basis of this analysis, provide for ultra low dielectric loss.
M. M. BUNAG, J. H. KOENIG
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Dielectric Loss in Solids

1983
Efficient utilization of electrical insulating materials in electrical apparatus, devices, and cables requires knowledge of the dielectric loss behavior of materials under specific voltage, frequency, and temperature conditions. The appearance of significant dielectric losses may not only represent an unnecessary energy loss but could possibly lead to ...
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Optical losses in dielectric films

Thin Solid Films, 1976
High quality optical resonators for laser and Fabry-Perot interferometer and narrow band interference filters consist of a variable number of dielectric films which should not cause optical attenuation in the desired wavelength region. Related to the growth of integrated optics technology, this trend towards exceptionally high quality optical materials
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Relaxation in low-loss dielectrics

Journal of Molecular Liquids, 2000
Abstract The real and imaginary components of the complex susceptibility of the majority of non-polar dielectric materials follow a fractional power law dependence on frequency known as the “universal law”. One limiting form of this law shows a very low loss and also a nearly frequency-independent, or “flat” amplitudes.
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