2016 | OriginalPaper | Chapter
Conductivity of KF-NaF-AlF3 System Low-temperature Electrolyte
Authors : Jianhong Yang, Wangxing Li, Hengwei Yan, Dan Liu
Published in: Light Metals 2013
Publisher: Springer International Publishing
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The continuously varying cell constant (CVCC) technique was applied to measure the conductivity of molten KF-NaF-AlF
3
electrolyte with ([NaF]+[KF])/[AlF
3
] ratio (CRT) between 1.2 to 1.5. The investigated temperature range is 750 to 820 °C. The effect of CRT, temperature, NaF and alumina on conductivity was studied. An empirical formula for calculating conductivity of the KF-NaF-AlF
3
melt was derived:
κ
= 0.1442 × N
2
+ 0.164 × N + 16.947 × R
3
− 68.086 × R
2
+ 91.534 × R + (8.812 × l0
−5
×
T
− 0.0874) × A + 1.39 × 10
−3
×
T
− 41.1785
Where,
κ
is the conductivity, in S·cm
−1
, N is the mole fraction of NaF, R is the CRT of electrolyte, A is the mass fraction of Al
2
O
3
,
T
is the temperature of melt in degree centigrade.