Electric Conductivities of Molten Salts in the Sodium Fluoride-Calcium Fluoride-Aluminum Fluoride System

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概要

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• The specific electric conductivities of ternary molten salts in the NaF-CaF_2-AlF_3 system relating to the electrolytes for primary aluminum smelting and aluminum refining were measured. 1) In these ternary molten salts, the measuring values of the specific electric conductivity were 4.57〜1.30 ohm^<-1>cm^<-1> in the composition range of 5〜20 wt.% CaF_2 at 1000℃. 2) When the content of calcium fluoride is kept constant, the specific electric conductivity decreases almost linearly with the increase of aluminum fluoride weight percentage. Moreover, the specific electric conductivity decreases as the content of calcium fluoride increases also. 3) The additivity law for conductance is applicable only in a limited region, then it is considered that the molten salt in this system may be complicated in structure because of the existence of various compounds such as Na_3AlF_6, NaAlF_4, Na_5Al_3F_<14>, CaAlF_5 and NaCaAlF_6 etc.

• 東北大学の論文

著者

• TANIUCHI Kentaro

  The Research Institute of Mineral Dressing and Metallurgy

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• Electrical Conductivities of Quaternary Molten Salts in the Sodium Fluoride-Calcium Fluoride-Barium Fluoride-Aluminum Fluoride System
• Electric Conductivities of Molten Salts of Some Binary Fluoride Systems

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