二甲基亚砜-水混合溶液的等效介电常数特异性研究

Specific Phenomenon of Permittivity of DMSO-H_2O Mixture Solution

在2.45GHz下利用微扰谐振腔法测量二甲基亚砜(DMSO)-水(H2O)混合溶液的等效介电常数过程中,发现混合溶液等效介电常数虚部大于其中任一组分的介电常数虚部的特异现象.分析表明,这种特异性现象的发生主要是由于DMSO与H2O混合后溶液的高频摩擦项大于混合前引起的.因此,经典混合物介电常数公式需要进行适当修正才能较好地适用于这类特异性问题计算.

The permittivity of the dimethylsulfoxide （DMSO）-water （H20） mixture solution was measured by a resonant cavity perturbation method at 2.45 GHz. The measured-results show a specific phenomenon that the imaginary part of the mixture solution permittivity is larger than that of each of the components. The theoretical calculation indicates that the reason for that phenomenon is that high frequency friction is increased due to the mixture of DMSO and H2O, which implies that the classic mixture formula needs to be modified for calculation of the specific phenomenon.