Electrical Conductivity of Molten Cryolite and Potassium, Sodium, and Lithium Chlorides
Electrical Conductivity of Molten Cryolite and Potassium, Sodium, and Lithium Chlorides
复制标题
熔融冰晶石和氯化钾、氯化钠和氯化锂的电导率
DOI：
10.1149/1.2779646
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发表时间：
1952
影响因子：
3.9
通讯作者：
L. F. Maranville
中科院分区：
文献类型：
--
作者：
J. D. Edwards;C. S. Taylor;A. S. Russell;L. F. Maranville
本文提出了一种改进的测定方法，并将反应熔盐棒的电导率L1法应用于冰晶石。该方法采用具有两个同心半球形电极的铂电池。该池保持在熔融盐表面下方的固定距离处，熔融盐保持在较大的铂容器中。用Kelvin双桥（Thomson电桥）测量消除了引线电阻的误差，并将电阻与频率-~/2的近似线性关系外推到无限频率，减少了极化的困难。用石英浸渍池测定了熔融氯化钾、氯化钠、棒状氯化锂的电导率。在1000 ℃时，电导率（Ω~cm~-）的最佳烟道为：冰晶石2.8（I）;氯化钾2.5（I）。氯化钠4.17~g，氯化锂700~6.14用铂沉降器测得的密度（g/ml），从熔点到1080 ℃，符合下列方程：氯化钾1.964 ℃。574 "10-at;氯化钠1.969 0.524。10-a/;冰晶石3.032 0.937。10-at。等效电导（A）的对数与绝对温度（T）的倒数成线性关系。电导的活化能（keal/mole）的最佳值（计算为2.303乘以1.986 eal/mole deg乘以log A对l/T的斜率）为：冰晶石4.48;氯化钾3.32;氯化钠3.04;锂水1.70。与室内空气相比，保持熔融的冰晶石与氩气气氛接触对冰晶石的测量电导率值的影响可以忽略不计。
An improved technique has been developed for the determination of the electric, L1 conductivity of reactive molten salts" rod has been applied to cryolite. The method employs a platinum cell with two concentric hemispherical electrodes. This cell is m'dntained a fixed distance below the surface of the molten salt which is held in a larger platinum container. Errors from lead resistance h'tve been eliminated by measuring with a Kelvin double bridge (Thomson bridge) and pol'~ rization difficulties have been minimized by extrapolation of the nearly linear plot of resistance vs. frequency-~/2 to infinite frequency. Conductivities of molten potassium chloride, sodium chloride," rod lithium cloride were determined with a quartz dip-cell. Best v. flues for the conductivities (ohm-~ cm-~) at 1000~ were: cryolite 2.8 (I; potassium chloride 2. g5_~; sodium chloride 4.17~; and lithium chloride at 700~ 6.14. Densities (g/ml), measured by a platinum sinker, were found to follow these equations from the melting points to 1080~: potassium chloride 1.964~). 574" 10-at; sodium chloride 1.969 0.524. 10-a/; cryolite 3.032 0.937. 10-at. The logarithm of equivalent conductance (A) eh, mged linearly with reciprocal absolute temperature (T). Best values for the actiwttion energy for conductance (keal/mole)(calculated as 2.303 times 1.986 eal/mole deg times slope of log A vs. l/T) were: cryolite 4.48; potassium chloride 3.32; sodium chloride 3.04; lithium ehloride 1.70. Maintaining the fused cryolite in contact with an atmosphere of argon as compared with room air had a negligible effect upon the measured conductivity values for cryolite.