Journal ArticleDOI
Dielectric Properties of Ice and Solid D2O
Robert P. Auty,Robert H. Cole +1 more
TLDR
In this article, complex dielectric constants have been measured for ice from the melting point to −65°C and for solid D2O to −35°C, by a combination of bridge and transient methods.Abstract:
Complex dielectric constants have been measured for ice from the melting point to −65°C, and for solid D2O to −35°C, by a combination of bridge and transient methods. For both, the dispersion is described by the simple Debye formula, and the relaxation times τ by the simple rate expression τ = A exp(B/RT). For ice, A = 5.3×10−16 sec, B = 13.2 kcal/mole; and for solid D2O, A = 7.7×10−16 sec, B = 13.4 kcal/mole. The equilibrium dielectric constant for ice is 91.5 at 0°C and increases at lower temperatures; the values for solid D2O are only slightly smaller. Measures taken to minimize errors from voids in the sample and direct current conductance are discussed.read more
Citations
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Journal ArticleDOI
The low-frequency dielectric properties of ethylene oxide and ethylene oxide hydrate
D. W. Davidson,G. J. Wilson +1 more
TL;DR: The static dielectric constant of liquid ethylene oxide has been measured between 158 and 286 °K as mentioned in this paper, and the activation energy for the relaxation of water molecules, to which this region is ascribed, is ca. 6.7 kcal/mole.
Journal ArticleDOI
Complex Permittivity of the Antarctic Ice Sheet in the VLF Band
TL;DR: In this article, the authors describe an experiment conducted near Byrd Station during November, 1971, in which the properties of the surface magnetic field between 5 and 20 kHz were measured in the immediate vicinity of a buried 34-km dipole antenna just under the surface of the snow.
Proceedings ArticleDOI
A capacitive ice layer detection system suitable for autonomous inspection of runways using an ROV
K Cyril Baby,Boby George +1 more
TL;DR: A capacitive sensor that can be integrated into an ROV for automated inspection of ice layers in important locations like runways is proposed in this paper and it has been observed that the developed system successfully detected ice layers as thin as 1 mm.
Journal ArticleDOI
The Surface Structure of Silica Gel Studied by Dielectric Dispersion
Seiichi Kondo,Masa-aki Muroya +1 more
TL;DR: In this article, the effect of water adsorption and heat treatment at various temperatures between 200 and 1100°C on the dielectric dispersions of silica gel was measured in the frequency range from 50 to 3×106 Hz and 9.81 GHz and in the temperature range from −196°C to 180°C.
References
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Journal ArticleDOI
The Dielectric Polarization of Polar Liquids
TL;DR: In this paper, an extension of the Onsager theory of dielectric polarization is presented, which is applied to liquid water under the assumption of tetrahedral coordination and directed bonds between neighboring molecules.
Journal ArticleDOI
A Wide Range Capacitance‐Conductance Bridge
Robert H. Cole,Paul M. Gross +1 more
TL;DR: In this paper, the authors describe a bridge for reasonably accurate measurement by direct balance of capacitance and conductance in the frequency range 50 c/sec. to 5 cm/sec., and over most of this range is essentially direct reading in the two admission components with negligible unbalance from lead effects or guard circuits of the unknown.
Journal ArticleDOI
A Calculation of the Static Dielectric Constant of Ice
TL;DR: In this article, a calculation of the static dielectric constant of ice using only simple molecular data and with well-defined assumptions as to the possibilities of molecular movement in the crystal is presented.
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