论文部分内容阅读
在前一篇报导中我们曾经确定了 La_2O_3-BeO系统中包括有 La_2O_3·2BeO 和 3La_2O_3·2BeO 两个化合物。其中铍氧聚合阴离子的结构型式可能分别是Be_2O_5~(6-)和 BeO_4~(6-)。以下我们将假定熔体内也有铍氧复合离子存在,并引入一种化学反应的熔体结构模型,通过化学平衡计算,可更好地说明 BeO 活度的变化。按照热力学关系,溶液中溶媒的熔点降低表示
In our previous report we have identified two compounds, La 2 O 3 · 2BeO and 3La 2 O 3 · 2BeO, in the La 2 O 3 -BeO system. The structure of beryllium oxyanion may be Be2O5 ~ (6-) and BeO_4 ~ (6-), respectively. In the following, we will assume that beryllium-oxygen complex ions are also present in the melt and introduce a chemical structural model of the melt that can better account for changes in BeO activity through chemical equilibrium calculations. According to the thermodynamic relationship, the melting point of the solution in the solution is reduced