Solubility Measurements of Fe2O3 and Cr2O3 in Fused Na2B4O7-B2O3 in Air at 1173 K
2016 年 57 巻 2 号 p. 143-147
詳細
2016 年 57 巻 2 号 p. 143-147
The solubility of Fe2O3 and Cr2O3 powder in a binary fused Na2B4O7-B2O3 salt system was measured at 1173 K in air. The melt was continuously monitored via a basicity sensor with an oxide ion probe and a zirconia oxygen probe. The basicity of the fused salt was varied from 10.3 to 14.5 by adding B2O3 powder to Na2B4O7. For the entire range of the measured basicity, solubility of the Fe2O3 was one order of magnitude higher than that of the Cr2O3. The solubility of both the Fe2O3 and the Cr2O3 decreased with an increase in the melt basicity. From the solubility dependence on the melt basicity, both Fe2O3 and Cr2O3 are expected to dissolve via a basic dissolution reaction.
