Electrical Behaviour of Finely Divided Ice
Electrical Behaviour of Finely Divided Ice
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细碎冰的电学行为
DOI：
10.3189/s0022143000033396
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发表时间：
1978
影响因子：
3.4
通讯作者：
J. Glen
中科院分区：
文献类型：
--
作者：
J. Paren;J. Glen
摘要研究了经细磨和压缩的冰在空气中和一定温度范围内老化过程中的电学行为。介电行为可以精确地表示为两个椭圆弛豫谱之和。对于每个谱c的平均弛豫时间，该行为最终以相似的活化能稳定。0.25 eV，并且在密度C的样品中弛豫时间的比率为10。0.42毫克m-3。参数上是否较高的频率分散是样品的异质性的后果，或者是一个批量松弛过程。这种精细的地面冰和沉积的雪和极地冰川冰的行为之间的相似之处进行了讨论。在何种程度上的结果可能归因于表面吸附的CO2检查参考测量的CO2含量的细分冰和冰从极地地区。
Abstract The electrical behaviour of ice which has been finely ground and compressed was investigated during ageing in air and over a range of temperatures. The dielectric behaviour may be accurately represented as the sum of two elliptical relaxation spectra. The behaviour eventually stabilizes with similar activation energies for the mean relaxation time of each spectrum c. 0.25 eV, and the ratio of the relaxation times is ten in samples of density c. 0.42 Mg m-3. Arguments are presented on whether the higher-frequency dispersion is a consequence of the heterogeneous nature of the samples or is a bulk relaxation process. The similarities between the behaviour of such finely ground ice and of deposited snow and polar glacier ice are discussed. The extent to which the results may be attributed to surface adsorption of CO2 are examined by reference to measurements of the CO2 content of finely divided ice and ice from polar regions.