KNO3-NaNO2-NaNO3三元熔盐体系的电导率研究

采用CVCC(连续改变电导池常数)法测定了KNO3-NaNO2-NaNO3熔盐体系不同组成在不同温度下的电导率,分析了该体系电导率的主要影响因素.实验结果表明:采用CVCC法测定的熔盐体系电导率,与参考文献9]提出的数值的相对误差为0.78%,结果准确可靠,可以满足一般科研实验的精度要求.KNO3-NaNO2-NaNO3三元熔盐体系的电导率和温度的倒数呈指数关系;体系的各组分对电导率有着不同的影响,NaNO2含量的增大会使该熔盐体系的电导率增大,而KNO3含量的增加会使体系电导率减小,NaNO3含量变化对体系电导率的影响不大.

Study on Electrical Conductivity of the Molten Salts of KNO3-NaNO2-NaNO3 Ternary System

The electrical conductivity of the molten salts of KNO3-NaNO2-NaNO3 ternary system with different compositions was measured at different temperatures by the continuously varying cell constant (CVCC)technique. The main influencing factor on electrical conductivity was analyzed. Experimental results showed that the electrical conductivity measured by CVCC technique is accurate and reliable, of which the relative error is just 0.78% in comparison with what was given by the reference 9]. There is an exponential relationship between the conductivity and reciprocal value of temperature in the system, and the conductivities of the melts are variable because they are affected by the different compositions of the system. With the increasing content of NaNO2, the electrical conductivity of this system increases, while it decreases with increasing content of KNO3. As to the content of NaNO3, it affects little the conductivity.