THERMODYNAMICS OF NA2O IN THE MOLTEN CAO-CAF2-SIO2 SYSTEM

被引：6
作者：
KIMURA, H
TSUKIHASHI, F
SANO, N
机构：
[1] Department of Metallurgy, The University of Tokyo, Tokyo
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 1995年 / 26卷 / 03期
关键词：
D O I：
10.1007/BF02653873
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The activity of a few percent of Na2O in the CaO-CaF2-SiO2 system doubly saturated with CaO and 3CaO . SiO2 has been determined between 1423 and 1623 K by a chemical equilibration technique. The temperature dependence of the activity coefficient of Na2O may be expressed as follows. log gamma(Na2O) = -18,600(+/-1100)/T + 7.23 (+/-0.08) It was found that Henry's law holds up to 5 mass pet of Na2O in the flux at 1473 K. The activity of a small amount of Na2O in the CaO-CaF2-SiO2 flux is discussed in comparison with that for the Na2O-SiO2 system in terms of their refining characteristics.
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页码：553 / 556
页数：4
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