Results 311 to 320 of about 4,417,224 (372)

Percolative ceramic composites with giant dielectric constants and low dielectric losses

, 2010
Percolative composites with significant dielectric properties have been synthesized from Ba0.8Sr0.2TiO3 matrix, Ag particles and a PbO-B2O3 glass dopant by a traditional ceramic method.
Jiquan Huang, Hui Zheng, Zuhuang Chen, Qian Gao, N. Ma, P. Du   +5 more
semanticscholar   +1 more source

Dispersion and Loss in a Hopfield Dielectric [PDF]

Europhysics Letters (EPL), 1992
We develop a fully canonical quantization scheme for the electromagnetic field in linear dielectrics, including dispersion and losses. This scheme is based on the Hopfield model of a dielectric, where the medium is represented by a number of interacting matter fields.
Stephen M. Barnett, B. Huttner
openaire   +1 more source

Thickness influence on dielectric loss

Journal of Physics and Chemistry of Solids, 1976
Abstract Dielectric loss is essentially a macroscopic property valid for sufficiently thick samples. However, if the sample has a defect structure which varies with thickness and takes part in a particular relaxation process, the dielectric loss is expected to become thickness dependent.
V.K. Srivastava, S.K. Gupta
openaire   +3 more sources

Reduction of dielectric losses in substrate integrated waveguide

, 2006
The impact of different loss mechanisms on the attenuation of the substrate integrated waveguide (SIW) is investigated. Using a multilayer PCB technology, an air-cut region is introduced in the SIW structure to reduce the attenuation caused by dielectric
N. Ranjkesh, M. Shahabadi
semanticscholar   +1 more source

Dielectric nanocomposite with high dielectric permittivity and low dielectric loss

2015 IEEE Electrical Insulation Conference (EIC), 2015
Dielectric flexible nanocomposites featuring ferroelectric barium titanate nanoparticles embedded in poly(vinylidene fluoride) (PVDF) matrix were fabricated by a miscible-immiscible coagulation method followed by hot pressing. The SEM images showed good distribution of nanoparticles with very little particle agglomeration.
Youngho Jin, Rosario A. Gerhardt, Ning Xia   +2 more
openaire   +2 more sources

Chaotic dynamics and dielectric loss [PDF]

Physics of the Solid State, 2008
The dielectric losses due to the chaotic dynamics in disordered heterogeneous systems of the type of statistical mixtures with a chaotic distribution of the components having the real permittivities of opposite signs are investigated. The specific features observed in the behavior of these systems in the vicinity of the percolation threshold and far ...
S. I. Garmashov, A. V. Turik
openaire   +1 more source

On the Theory of Dielectric Loss

Physical Review, 1941
When a sinusoidal voltage is applied to a condenser containing an absorptive dielectric the absorption current can be split up into two components, one in phase and another in quadrature with the voltage. In the present paper, direct relations, suitable for numerical calculation, are established between these components, and a general relationship ...
openaire   +2 more sources

Microwave Measurements of the Loss in Low Loss Dielectrics

Review of Scientific Instruments, 1970
A technique has been developed which offers a significant improvement in the measurement of the loss in low loss materials having dielectric constants ≥4. The device consists of a cutoff section of circular waveguide concentrically loaded with a rod of the dielectric to be measured.
R. E. Jaeger, E. M. Gyorgy
openaire   +2 more sources

Dielectric loss with changing temperature [PDF]

Electrical Engineering, 1949
INDUSTRIAL dielectric heating by high electric frequency, for curing or thermosetting, frequently involves heating cycles over the range 20 seconds to four or five minutes duration, for temperatures up to 250 degrees Fahrenheit. Rates of temperature rise up to 400 degrees Fahrenheit per minute or more are common.
W. Rueggeberg, John B. Whitehead
openaire   +1 more source

The nature of dielectric losses in H‐Film

, 1973
Based upon the high-temperature solid-state dielectric behavior of H-Film and supporting evidence from infrared spectroscopy, heat capacity, thermal expansion, and dynamic mechanical measurements, it is concluded that the actual chemical structure of H ...
W. Wrasidlo
semanticscholar   +1 more source