PHASE DIAGRAM CALCULATION OF QUASI-BINARY SYSTEM Na₃AlF₆-K₃AlF₆

ＰＨＡＳＥＤＩＡＧＲＡＭＣＡＬＣＵＬＡＴＩＯＮＯＦＱＵＡＳＩ－ＢＩＮＡＲＹＳＹＳＴＥＭＮａ３ＡｌＦ６－Ｋ３ＡｌＦ６￥Ｚｈｏｕ，Ｃｈｕａｎｈｕａ；Ｓｈｅｎ，Ｊｉａｎｙｕｎ；Ｌｉ，Ｇｕｏｘｕｎ(Ｄｅｐｔ３０１，ＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉ...

The quasi-binary system Na_3AlF_6-K_3AlF_6 was optimized based on CALPHAD technique using a computerized optimization procedure called PARROT included in Thermo-calculation. The two-sublattice model was used for the liquid phase in which K￣(1+), Na￣(1+)were taken as cation, and AlF as anion. The compound 2K_3AlF_6·Na_3AlF_6 was modeled as stoichiometric phase. The phase diagram was analyzed according to the assessed result.