Journal ArticleDOI
Reference liquids for the calibration of dielectric sensors and measurement instruments
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TLDR
In this article, a comparative study of microwave complex dielectric permittivity data from different laboratories is provided for liquids, including water, cyclohexane, methanol and dimethyl sulphoxide.Abstract:
A comparative study of microwave complex dielectric permittivity data from different laboratories is provided for liquids. Four liquids—water, cyclohexane, methanol and dimethyl sulphoxide—are recommended as reference materials because their parameter sets from different measurements result in almost identical predictions of their dielectric properties in the frequency range up to 10 GHz. Within the limits of experimental error this agreement includes that of the extrapolated low frequency permittivity with the recently determined static permittivity of the liquids. Parameters for water are given for the frequency range 0–60 °C. For cyclohexane, which does not display relaxation behaviour up to the submillimetre frequency range, the frequency-independent permittivity is represented between 10 and 50 °C. Relaxation and static permittivity data for methanol and dimethyl sulphoxide are presented at 25 °C.read more
Citations
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Interactions and dynamics in electrolyte solutions by dielectric spectroscopy
Richard Buchner,Glenn Hefter +1 more
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Journal ArticleDOI
Experimental Investigations on the Frequency- and Temperature-Dependent Dielectric Material Properties of Soil
TL;DR: Comparison of ALRM applied to the investigated frequency and temperature range with sophisticated broadband relaxation models indicates the potential and the limitation to predict the high-frequency electromagnetic material properties.
Journal ArticleDOI
Measuring the dielectric properties of materials. Ninety-year development from low-frequency techniques to broadband spectroscopy and high-frequency imaging
TL;DR: The development of methods for measuring the dielectric properties of materials is reviewed with a special view to the background of the past 90 years in this article, where the close correlation between progress in measurement methods and scientific and technological advances is shown.
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Numerical 3-D FEM and Experimental Analysis of the Open-Ended Coaxial Line Technique for Microwave Dielectric Spectroscopy on Soil
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References
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Journal ArticleDOI
Dispersion and Absorption in Dielectrics I. Alternating Current Characteristics
Kenneth S. Cole,Robert H. Cole +1 more
TL;DR: In this paper, the locus of the dielectric constant in the complex plane was defined to be a circular arc with end points on the axis of reals and center below this axis.
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Isothermal compressibility of supercooled water and evidence for a thermodynamic singularity at −45°C
TL;DR: In this article, the authors used a capillary technique for small samples to measure the isothermal compressibility κ T of water to −26°C and showed that the anomalous characteristics are due to the sensitivity of the volume to temperature changes, suggesting a geometrical basis for the cooperative behavior.
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Complex Permittivity of Water as a Function of Frequency and Temperature
Journal ArticleDOI
Far-infrared dielectric properties of polar liquids probed by femtosecond terahertz pulse spectroscopy
TL;DR: In this paper, the frequency-dependent optical constants, n(ν) and α(ν), for water, methanol, ethanol, 1-propanol, and liquid ammonia were reported.