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分别测定不同温度下粉末状α－Ａｌ２Ｏ３在Ｎａ３ＡｌＦ６－ＡｌＦ３（摩尔比１∶１）Ｋ３ＡｌＦ６－ＡｌＦ３（摩尔比１：１）及Ｎａ３ＡｌＦ６－Ｋ３ＡｌＦ６－ＡｌＦ３（摩尔比０．５：０．５：１）熔盐体系中的溶解度和溶解速度。探讨和分析了ＬｉＦ对Ｎａ３ＡｌＦ６－Ｋ３ＡｌＦ６－ＡｌＦ３熔体（摩尔比０．５：０．５：１）中氧化铝溶解度的影响。结果表明氧化铝在低温钾冰晶石体系Ｎａ３ＡｌＦ６－Ｋ３ＡｌＦ６－ＡｌＦ３（摩尔比０．５：０．５：１）中的溶解度和溶解速度能够满足低温电解的要求。
The molar ratio of α-Al2O3 to Na3AlF6-AlF3 (molar ratio 1: 1) K3AlF6-AlF3 (molar ratio 1: 1) and Na3AlF6-K3AlF6-AlF3 (molar ratio 0.5: 0.5: 1) Solubility and dissolution rate in molten salt systems. The effect of LiF on the solubility of alumina in Na3AlF6-K3AlF6-AlF3 melt (molar ratio 0.5: 0.5: 1) was investigated and analyzed. The results show that the solubility and the dissolution rate of alumina in cryogenic potassium cryolite system Na3AlF6-K3AlF6-AlF3 (molar ratio of 0.5: 0.5: 1) can meet the requirements of low-temperature electrolysis.