The dielectric properties of H2O and D2O ice Ih at MHz frequencies
The dielectric properties of H2O and D2O ice Ih at MHz frequencies
复制标题
MHz 频率下 H2O 和 D2O 冰 Ih 的介电特性
DOI：
10.1063/1.432033
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发表时间：
1976
影响因子：
4.4
通讯作者：
G. P. Johari
中科院分区：
文献类型：
--
作者：
G. P. Johari
在 243–273 °K 的温度范围内，在 0.5–100 MHz 之间测量了介电常数和冰损失 Ih。对极限高频介电常数 e 的温度依赖性分析表明，已知晶格振动频率随温度升高而降低，预测 e 的值远高于测量值。建议红外频率的吸收率应随着温度的升高而降低。冰的氘化使其 e∞ 降低约 3%。这被解释为表明 D2O 中的红外频率吸收比 H2O 冰中的吸收少。 Ice 显示出以 MHz 频率范围为中心的二次弛豫，在 268 °K 时振幅为 0.08。垂直于 c 轴测量的单晶冰的 e∞ 与多晶冰的 e∞ 无法区分，因此表明高频偏振的各向异性很小。
The permittivity and loss of ice Ih have been measured between 0.5–100 MHz in the temperature range 243–273 °K. An analysis of the temperature dependence of the limiting high‐frequency permittivity e∞ shows that the known decrease in frequency of lattice vibrations with increasing temperature predicts values of e∞ much higher than those measured. It is suggested that the absorptivity at the infrared frequencies should decrease with increasing temperature. Deuteration of ice decreases its e∞ by ∼3%. This is interpreted to indicate less absorption of infrared frequencies in D2O than in H2O ice. Ice shows a secondary relaxation centered in the MHz frequency range with an amplitude of 0.08 at 268 °K. The e∞ of single crystal ice, measured perpendicular to the c axis, is indistinguishable from that of polycrystalline ice, thus indicating little anisotropy of the high‐frequency polarization.