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
Permittivity of ice at radio frequencies: Part I. Coaxial transmission line cell
TL;DR: In this article, a coaxial transmission line setup was adapted for measuring ice samples between 10 MHz and 1.5 GHz at − 20 °C, with a mean value of 3.18 ± 0.01.
Journal ArticleDOI
A dielectric study of the synthetic linde type-A zeolite-III. dielectric properties of 3-A, 4-A and Ag-A with adsorbed water
TL;DR: In this article, the authors measured the permittivity and dielectric loss factor for the Molecular Sieve Zeolites type 3-A and 4-A, and a silver exchange form of type-A with various amounts of adsorbed water present.
Journal ArticleDOI
Dielectric characterization of ice/MgSO4⋅11H2O mixtures as Jovian icy moon crust analogues
Elena Pettinelli,Sebastian Lauro,Barbara Cosciotti,Elisabetta Mattei,Federico Di Paolo,Giuliano Vannaroni +5 more
TL;DR: In this paper, the impact of magnesium sulfate hydrates on the electrical properties of water ice was quantified by performing a series of dielectric measurements on different ice/MgSO4⋅11H2O mixtures as a function of frequency and at temperatures comparable with those expected on the icy satellite surfaces.
Passive microwave mapping of ice thickness
TL;DR: In this article, an analytical model for the apparent brightness temperature as a function of ice thickness has been developed, and elaborated to include such variables as galactic and atmospheric noise, aspect angle, polarization, temperature gradient in the ice, the presence of transition layers such as snow, slush, and water, increased loss due to air inclusions in the air layer, and presence of multiple ice thicknesses within the antenna footprint.
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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