Specific Conductance of Molten Potassium Nitrate

Abstract

A careful determination of specific conductance of molten potassium nitrate over the temperature range 345°–541°C has demonstrated its suitability as a molten salt standard in electrical conductance work. The data are well represented false(σ=0.0008false) by the computer‐fitted, least squares equation k=−0.7098+4.6203×10−3 tfalse(°Cfalse)−2.0221×10−6 t2 The estimated accuracy is better than ±0.5%. Of the previous investigations on this system, the limited temperature equation of Smith and Van Artsdalen agrees best with the results reported here.

Electrical Conductivity of LiCl–KCl–CsCl Melts

“…Comparison between the electrical conductivities of pure NaNO 3 and KNO 3 in this work and data from different references: (red ○) KNO 3 (in this work); (■) KNO 3 (ref ); (blue □) KNO 3 (ref , page 594); (green ▲) NaNO 3 (in this work); (purple △) NaNO 3 (ref , page 619).…”

“…For evaluating accuracy of the data obtained in this work, the electrical conductivities of pure KNO 3 and NaNO 3 were measured by the method mentioned above and the results were compared with the data from refs and , which are shown in Figure . All the data is also presented in Tables S1 and S2.…”

“…R is the measured resistance in Ω. The cell constant C of the capillary cell was 136.6 cm −1 and calibrated using potassium nitrate melt within a temperature range of 613 to 673 K. Compared to the reference values given by G. D. Robbins and J. Braunstein, 28 the deviation is less than 1%. The temperature range for the conductivity measurement is from the liquidus temperature of the investigated melt to 723 K. The liquidus temperatures of the investigated melts were determined by the thermal analysis (TA), which was performed under an atmospheric pressure of argon in the same quartz crucible with ports for thermocouple and argon gas inlet.…”

“…R is the measured resistance in Ω. The cell constant C of the capillary cell was 136.6 cm –1 and calibrated using potassium nitrate melt within a temperature range of 613 to 673 K. Compared to the reference values given by G. D. Robbins and J. Braunstein, the deviation is less than 1%.…”

The Electrical Conductivity of Solid and Molten Cesium Hydroxide – A Contribution to Solid Proton Conductors

“…[16]). The cell constant for various conductivity cells which was calibrated with potassium nitrate melts at various temperatures [17] did not change more than 5% within a period of up to 15 days. potentiostat (Wenking ST 72), the current being measured from the voltage drop on a standard resistor in series with the electrochemical cell (Hewlett Packard digital voltmeter 3456 A, input resistance > 10" 0).…”