CVCC法测定冰晶石系熔盐电导率的应用研究

通过对标准KCl水溶液电导率的测定,验证了连续变化电导池常数(CVCC)法的可行性;证明了使用该方法测定水溶液或熔盐电导率时,极化电阻带来的实验误差很小,而且实验中不必再进行导线和电极电阻的去除,从而简化了实验步骤.通过对不同Al2O3含量的Na3AlF6-Al2O3熔盐电导率进行测定并与以前研究者的数据进行比较,证明CVCC法测定铝电解质体系以及其他高温熔盐的电导率具有很高的精确度.

Application of Measuring Electrical Conductivity of Cryolite-Based Melts by CVCC Technique

The continuously varying cell constant(CVCC) technique was verified to be feasible by measuring the electrical conductivity of standard KCl solution.It was found that the error due to polarization resistance is very small if using CVCC technique to determine the electrical conductivity of aqueous solutions and molten salts,and no deduction of lead/electrode resistance value from read-out value required,thus simplifying the experimental procedure.The electrical conductivity of Na_3AlF_6-Al_2O_3 melts with different Al_2O_3 contents was measured by CVCC technique and the results were compared with the relevant data in earlier works.It was proved that CVCC technique can measure accurately the electrical conductivity of aluminium electrolyte and other high-temperature molten salts.