Conductivity of deionized two-component colloidal suspensions
Conductivity of deionized two-component colloidal suspensions
复制标题
去离子双组分胶体悬浮液的电导率
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
T. Palberg
中科院分区：
文献类型：
--
作者：
P. Wette;H. Schöpe;R. Biehl;T. Palberg
研究了由带电乳胶球组成的去离子水悬浮液的低频交流电导。对于单组分情况，σ与颗粒数密度n成线性关系，与悬浮结构无关。发现双组分混合物形成了替代晶体，并且由于尺寸差异较小，没有观察到相分离。则σ与单个电导率贡献的总和成正比。此外，在固定组成时，保持了随n的线性增加。将Hessinger的电导模型推广到双组分体系，可以很好地描述这种影响。
The low frequency ac-conductivity of deionized aqueous suspensions comprising of charged latex spheres is investigated. For the one-component cases σ increases linearly with particle number density n, irrespective of the suspension structure. Two-component mixtures are found to form substitutional crystals and no phase separation is observed for small size differences. Then σ is proportional to the sum of the individual conductivity contributions. Further at fixed composition the linear increase with n is retained. The effects can be well described with an extension of Hessinger’s conductivity model to two-component systems.