Dielectric Properties of Ices II, III, V, and VI
Dielectric Properties of Ices II, III, V, and VI
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Ice II、III、V 和 VI 的介电特性
DOI：
10.1063/1.1697137
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发表时间：
1965
影响因子：
4.4
通讯作者：
E. Whalley
中科院分区：
文献类型：
--
作者：
G. Wilson;R. K. Chan;D. Davidson;E. Whalley
冰II，III，V和VI的介电性能已被测量到高达300千摄氏度/秒的温度和压力范围内。除冰II外，所有的都表现出良好的介电色散，因此在实验条件下取向无序。色散轨迹比德拜曲线略宽，这可能反映了非等效晶体位点的存在。对于冰I，静态介电常数对应于柯克伍德取向相关因子的值约为3。这表明这些形式的冰是四配位的，与低温下的红外和（冰III）X射线证据一致。弛豫速率比冰I快得多，活化能和熵略低。活化体积均约为4.6 cm 3 mole−1。弛豫机制似乎与Ice I中的弛豫机制相似，即，X-射线和红外研究表明，Ice II是一种具有高强度的非晶态合金。
The dielectric properties of Ices II, III, V, and VI have been measured up to 300 kc/sec over a range of temperatures and pressures. All except Ice II exhibited well‐defined dielectric dispersion and so are orientationally disordered under the experimental conditions. The dispersion loci were slightly broader than Debye curves, which may reflect the presence of nonequivalent crystal sites. As for Ice I, the static dielectric constants correspond to values of about 3 for the Kirkwood orientational correlation factor. This suggests that these forms of ice are four coordinated, in agreement with infrared and (for Ice III) x‐ray evidence at low temperatures. The relaxation rates are considerably faster than for Ice I, and the activation energies and entropies somewhat lower. The volumes of activation are all about 4.6 cm3 mole−1. The relaxation mechanism appears to be similar to that in Ice I, i.e., relaxation occurs by diffusion of orientational defects.X‐ray and infrared studies have indicated that Ice II i...