Results 211 to 220 of about 47,598 (260)

Broadband local dielectric spectroscopy

Applied Physics Letters, 2016
A route to extend the measurement bandwidth of local dielectric spectroscopy up to the MHz range has been devised. The method is based on a slow amplitude modulation at a frequency Ω of the excitation field oscillating at a frequency ω and the coherent detection of the modulated average electric force or force gradient at Ω.
M Labardi, M Lucchesi, D Prevosto, S Capaccioli   +3 more
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Agricultural Applications of Dielectric Spectroscopy

Journal of Microwave Power and Electromagnetic Energy, 2003
A brief account of interest in dielectric properties of agricultural materials is presented, and some examples of dielectric spectroscopy applied to agricultural problems are discussed. Included are wide frequency range (250 Hz to 12 GHz) permittivity, or dielectric properties, measurements on adult rice weevils and hard red winter wheat, for the ...
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Dielectric spectroscopy of nanocomposites

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika), 2018
The influence of 1 wt. % nanoparticles (ZnO, TiO 2 , SiO 2 ) as fillers in an epoxy resin, known as nanocomposites, on the complex permittivity have been measured. The real and imaginary parts of the complex permittivity and dissipation factor within the frequency ranges from 1 mHz to 1 MHz were measured by a capacitance method.
Kudelcik Jozef, Emil Jahoda, Miroslav Gutten, Jaroslav Hornak, Pavel Trnka   +4 more
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Dielectric spectroscopy of polymers

Endeavour, 1977
Peter Hedvig Bristol: Adam Hilger 1977 pp 430 price £1750 (cased) (25% reduction for Institute of Physics members) This is a useful reference volume for anyone working in the area indicated by its title. This is indeed a large area, and the book includes not only information concerning the dielectrics spectra of particular polymers, but also includes ...
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Dielectric spectroscopy in agriculture

Journal of Non-Crystalline Solids, 2005
Abstract Reported measurements of the dielectric properties or permittivities over broad frequency ranges for some agricultural materials are cited, and graphical data from the cited literature are presented. They include 50-kHz to 12-GHz frequency-domain permittivity data for adult rice weevils and hard red winter wheat, time-domain reflectometry ...
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Introduction to Dielectric Spectroscopy

2010
This chapter presents the theoretical elements necessary to understand dielectric spectroscopy measurements. Low-frequency measurements are introduced in terms of lumped circuit parameters and other concepts of circuit theory. High-frequency measurements are discussed within the transmission line formalism.
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Dielectric spectroscopy of ferroelectrics

Ferroelectrics, 1980
Abstract Permittivity is one of some, most important pammeters characterizing physical properties of dielectric materials. The history of the investigation development of dielectrics traces some centuries back and is connected with the names of many outetanding scientists.
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Dielectric Spectroscopy in Collagen

1985
A lot of interest has been devoted to the study of the physical properties of collagen1,3. Nevertheless, because of different experimental conditions (temperature, frequency….) a significant discrepancy of data has been observed. Their interpretation, at the molecular level, remains speculative.
Marie-Françoise Harmand, Alain Lamure, Najia Hitmi, Colette Lacabanne   +3 more
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Dielectric Spectroscopy of Solutions

2004
This contribution gives a short introduction into the basic principles of dielectric spectroscopy and its application in solution chemistry. Exemplified by recent results it is shown that precise complex permittivity spectra obtained by the use of time domain and frequency domain methods in the mega- to gigahertz range yield specific information on ...
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Dielectric Relaxation Spectroscopy

2003
Nowadays dielectric spectroscopy covers the frequency range from 10−6 Hz to 1010 Hz by using computer controlled impedance analyzers [1–10], network analyzers as well as time domain spectrometers [11,12]. At higher frequencies (above 10 GHz) one should use wave-guides, which means that for each frequency a separate apparatus is necessary to perform ...
S. Wróbel, B. Gestblom, J. Jadżyn, P. Kȩdziora, L. Hellemans, A. Würflinger, S. Urban   +6 more
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