Results 351 to 360 of about 3,811,787 (369)

Relative permittivities of 10 organic liquids as functions of temperature

The Journal of Chemical Thermodynamics, 1993
Abstract Relative permittivities are reported for 10 purified liquids as functions of temperature T . The compounds are three perfluoroalkanes, three cycloalkanes, two benzenes, and two sulfides. The results were summarized using a single polynomial in T , except for the perfluoroalkanes near the critical points.
Norman Gee, Gordon R. Freeman
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Temperature‐Stable Relative Permittivity from −70°C to 500°C in (Ba0.8Ca0.2)TiO3–Bi(Mg0.5Ti0.5)O3–NaNbO3 Ceramics

, 2014
Temperature-stable relaxor dielectrics have been developed in the solid solution system: 0.45Ba0.8Ca0.2TiO3-(0.55-x) Bi(Mg0.5Ti0.5)O3-xNaNbO3. Ceramics of composition x = 0 have a relative permittivity ?r = 950 ± 15% over a wide temperature range from ...
A. Zeb, Y. Bai, T. Button, S. J. Milne
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Determining the relative permittivity of deep embedded biological tissues

2013 US National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), 2013
Human tissue characterization, deep into the body, has been of interest for decades. X-rays are used for locating tumors. However, such surgery-free identification methods fail to verify whether tumors are benign or malignant without surgical extraction and testing of sample tissue.
Safa Salman, John L. Volakis
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Relative permittivity and dielectric relaxation in aqueous alcohol solutions

Fluid Phase Equilibria, 1998
Abstract In this work, our objective was to study the hydrogen bonding of alcohols in aqueous solutions and alcohol dipole relaxation by measuring the complex permittivity. Alcohols chosen for study were methanol, ethanol and propanol over the full composition range and from 297–363 K. Measurements were made with a frequency domain technique from 100
H Komori, S.B Lee, Kunio Arai, Richard L. Smith   +3 more
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Relative permittivity of organic liquids as a function of pressure and temperature [PDF]

Journal of Physics A: General Physics, 1971
Precision measurements of the relative permittivity of n heptane at pressures up to 3334 bar and over a temperature range from 0 to 100 degrees C are reported. Similar data for carbon tetrachloride up to 1118 bars and at temperatures from 25 to 54 degrees C have also been obtained.
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A Simple Measurement of the Relative Permittivity of an Insulating Liquid

American Journal of Physics, 1969
A simple test cell has been devised in which the charge on one plate of a parallel-plate capacitor is repeatedly transferred to a capacitor—electrostatic voltmeter combination. From the voltmeter readings as the system is operated first in air and then in an insulating liquid, the relative permittivity of the latter can be evaluated with an error of ...
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Double-layer studies in solutions of low relative permittivity

Journal of the Chemical Society, Faraday Transactions, 1997
The capacitance of various electrolytes in dichloroethane, anisole and cyclohexane solutions are measured at a platinum electrode. It is found that specific adsorption occurs at large overpotentials from the potential of zero charge (pzc), but a diffuse-layer minimum is observed close to the pzc.
Abbott, AP, Harper, JC
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A Comprehensive Study of the Relative Dielectric Permittivity in Porous Media

Proceedings of SPE Western Regional Meeting, 2001
Abstract This study investigated the effects of water saturation and wettability on the dielectric permittivity experimentally, using four-electrode impedance measurements, and theoretically, using models that account for the electrical double layer polarization. Complex impedance measurements, performed on Berea sandstone
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Resonant-cavity measurements of the relative permittivity of a d.c. discharge

Proceedings of the IEE Part C: Monographs, 1955
The relative permittivity of a gaseous discharge has been measured at 2 100, 2 500, and 3 000Mc/s, using an H011 resonant-cavity method. The preliminary experiments were carried out using a discharge in a mixture of argon (2½ mmHg pressure) and mercury vapour. Later experiments employed a specially constructed low-pressure mercury-vapour tube.
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Enhanced relative permittivity in niobium and europium co-doped TiO2 ceramics

Journal of the European Ceramic Society, 2018
Zhuo Wang, Chen Haonan, Tian Wang, Xiao Yujia, Nian Wenwen, Jiahao Fan   +5 more
semanticscholar   +1 more source