Effect of Pressure on the Dielectric Properties of Ice I

Chan, R. K.; Davidson, D. W.; Whalley, E.

doi:10.1063/1.1697136

Cited by 80 publications

(35 citation statements)

References 32 publications

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“…In all ice and clathrate networks each molecule is hydrogen bonded to four neighbours with bond length of 2.8 ± 0.1 A [23,24]. The significant difference is that whereas in the clathrates and in ice I, the distance of closest approach of the nonbonded neighbours is ~4.5 Ä, in ices II, III, IV and V they lie in the range 3.2 -3.5 A.…”

Section: Discussion Pressure Dependence Of Dynamic Propertiesmentioning

confidence: 96%

The Pressure Dependence of Self Diffusion in Supercooled Light and Heavy Water

Prielmeier

Lang

Speedy

et al. 1988

Ber Bunsenges Phys Chem

177

153

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Section: Discussion Pressure Dependence Of Dynamic Propertiesmentioning

confidence: 96%

The Pressure Dependence of Self Diffusion in Supercooled Light and Heavy Water

Prielmeier

Lang

Speedy

et al. 1988

Ber Bunsenges Phys Chem

177

153

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“…The temperature dependence of dielectric properties (Fig. 4(a) and (b) of the first process correlates with that of pure ice [20]. However, unlike the Debye relaxation of pure ice, the relaxation in the green body demonstrates a nonDebye dependence, which can be connected to variance of the morphology of pores and the interaction of water molecules with the pores surface [16].…”

Section: Resultsmentioning

confidence: 95%

Dielectric characteristic of nanocrystalline Na0.5K0.5NbO3 ceramic green body

et al. 2012

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Dielectric spectroscopy was applied to porous nanocrystalline Na 0.5 K 0.5 NbO 3 (NKN) ceramic green body, wherein influences of percolation effect and water adsorption at pore surface of the ceramic green body on dielectric response were examined over wide temperature (150 to 450 K) and frequency (100 Hz to 1 MHz) ranges. Dielectric permittivity of the ceramic green body is about 2-3 orders of magnitude higher than that of pure NKN powder or NKN ceramic. Furthermore, the high dielectric permittivity and high humidity sensitivity of the ceramic green body can appear again with aging a period of time in air. The data from this investigation make potential applications for NKN as a giant dielectric material or a humidity sensing material.

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“…There has been a considerable discussion (Hollins, 1964;Chan and others, 1965; lohari and lones, I976) as to which of the two quantities 1' 00 or n 2 is appropriate in the calculation of m and some ambiguity still remains as to the frequency at which the orientation polarization separates from the distortion polarization. From Figures 5 and 7 3.…”

Section: S Talldard Orielltatiollmentioning

confidence: 99%

The Orientation Polarization in Hexagonal Ice Parallel and Perpendicular to the c-axis

Johari¹,

Jones²

1978

J. Glaciol.

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ABSTRACT. The relative permittivity and loss of zon e-refi ned si ngle crys ta ls of hexagonal ice have been measured in the temperature range 200-271 K a nd freq u e ncy range 0.5 Hz-O.2 MHz, using brass, stainless steel, and gold-foil electrodes. The c-axis of the crystal was oriented parallel to the electric field in 14 samples a nd perpendicular to the field in 8 sampl es. The eq uilibrium relative permittivity of orientation polarization '0, parallel and perpendicula r to the c-axis, is 96.5 ± I and the average relaxation time Tav is 36 I-'s at 265.5 ± 0.5 K ; '0 = 124 ± 1.5 a nd Tav = 30 ms, at 210 K. The magnitude of the orientatio n polarization obeys the Curie-Weiss equation with To = 15 ± 2 K fo r both the orienta tions. These values are in contrast with the c. 17 % difference in '0 for the two orientatio ns reported in the literature. The extrapolated limiting high-freq uency relative permittivity ' 00, measured fo r both the ori entations, is indistinguishable within 0.5 % .The loga rithmi c plot of the product of Tav a nd tempera ture against the reciprocal temperature is linea r in the range 210-271 K and gives an activation energy a nd a pre-exponential factor of 5 1 ± 2 kJ mol-I a nd 0.93 ± 0.22 ps K respectively, for both the orientations of the c-axis with respect to the electric field. The decrease in ac ti vatio n energy which h as been reported to occur in polycrystalline ice and in single crystal ice nea r 230 K is not found until a temperature of 2 1 0 K . Single crys tals of ice stored in the dielectric cell, after the completion of measurements, fo r periods ranging from 1-11 weeks at 253 ± 2 K showed no cha nge in their '0, Tav , ' 00 that could be attributed to the effect of ageing on the o ri e ntation polarization . R ESUME. Le trace logarithmique du produit Tav T, en fon ction de I'inverse d e la tem perature, I/ T , est linea ire dans le domain e d e temperature 210-27 1 K. On t ro u ve ainsi une energie d'activation de 5 1 ± 2 kJ mol-I et un fa cteur preexponentiel de 0,93 ± 0,22 ps K pour les d e ux orientatio ns de I'axe c par rapport a u champ electrique. La d ecroissance de I'en ergi e d'activation au.x a lentours de 230 K, qui a ete signaIee a ussi bien dans la glace polycristallin e que dans le glace monoc ristallin e n'a pu etre observee meme jusqu'a 2 10 K .Des mesures complt~tes de ' 0, Tav, ' 00 sur des monoc"istaux de glace co nser ves dans la cellule dielectrique pendant une p eriode de I it II semaines it 253 ± 2 K montrent que ces vale urs restent in changees; a u trement dit, il n'y a pas e u d'influence du vieillissement quant a u rol e de I'orientation de la polarisa tion. Der Betrag d er Orie ntierungspolarisation folgt einer Curie-Weiss-G leichung mit To = 15 ± 2 K fur beid e Kristallrichtunge n . Diese W erte stehen im Gegensatz zu d en etwa 17 % Unterschied in '0 fur die beiden Kristallrichtungen, die in der Lite ratur a ngegeben werden. Der extrapolierte Hochfrequenzgenzwert der relativen P ermittivitat, ' 00, gemessen in beiden Kristallrichtungen, ist innerh...

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Effect of Pressure on the Dielectric Properties of Ice I

Cited by 80 publications

References 32 publications

The Pressure Dependence of Self Diffusion in Supercooled Light and Heavy Water

The Pressure Dependence of Self Diffusion in Supercooled Light and Heavy Water

Dielectric characteristic of nanocrystalline Na0.5K0.5NbO3 ceramic green body

The Orientation Polarization in Hexagonal Ice Parallel and Perpendicular to the c-axis

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