Phase diagram of the system Na3AlF6-NaF-Na2SO4

被引：11

作者：

Danielik, V ^{[1
]}

Gabová, J ^{[1
]}

机构：

[1] Slovak Univ Technol Bratislava, Fac Chem Technol, Dept Inorgan Technol, SK-81237 Bratislava, Slovakia

来源：

THERMOCHIMICA ACTA | 2001年 / 366卷 / 01期

关键词：

cryolite; fluoride; phase diagram; ternary system; solid-liquid equilibria;

D O I：

10.1016/S0040-6031(00)00709-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

in the phase diagram of the system NaF-Na2SO4, a binary compound Na3FSO4 exists. The compound allows to divide the ternary system Na3AlF6-NaF-Na2SO4 into the two subsystems Na3AlF6-NaF-Na3FSO4 and Na3AlF6-Na2SO4-Na3FSO4. Experimental coordinates of the eutectic point in the subsystem Na(3)ALF(6)-NaF-Na3FSO4 are: 7.6 mole%Na3AlF6 + 54.6 mole% NaF + 37.8 mole% Na2SO4, 761 degreesC. Experimental coordinates of the eutectic point in the subsystem Na3AlF6-Na2SO4-Na3FSO4 are: 4.6 mole% Na3AlF6 + 26.3 mole% NaF + 69.1 mole% Na2SO4, 733 degreesC. Thermodynamic model for calculation of the system Na(3)ALF(6)-NaF-Na2SO4 is presented. The thermodynamic model describes well all available thermodynamic data of the system, viz. enthalpies of mixing and solid-liquid phase equilibria. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：79 / 87

页数：9

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[2]

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[3]

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[4]

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