Thermodynamic properties and phase equilibria in the CaF2-SiO2-Al2O3-CaO system:: III.: Thermodynamic properties of CaO-SiO2-Al2O3 melts

被引：0
|
作者：
Zaitsev, AI [1 ]
Litvina, AD [1 ]
Lyakishev, NP [1 ]
Mogutnov, BM [1 ]
机构：
[1] Bardin Cent Res Inst Iron & Steel Ind, Inst Phys Met, Moscow 107005, Russia
来源：
INORGANIC MATERIALS | 1998年 / 34卷 / 02期
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Knudsen effusion measurements combined with mass spectrometry of vapor species were used to study reactions of CaO-SiO2-Al2O3 melts with niobium, tantalum, and molybdenum, leading to the formation of volatile suboxides. The CaO-SiO2-Al2O3 melts were studied in the composition ranges 5.3-75.4 mol % SiO2, 0-29.5 mol % Al2O3, and 12.6-66.9 mol % CaO at temperatures between 1634 and 1841 K. The results are used to calculate silica activities in the melt. The experimental data are compared with the values obtained by extrapolating the thermodynamic properties of CaF2-SiO2-Al2O3-CaO melts to the CaO-SiO2-Al2O3 side of the composition triangle and with the data available in the literature.
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页码：157 / 163
页数：7
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