本文以Sn作为金属熔剂,石墨作为还原剂用,“渣-金”化学平衡法在1500和1550℃下,测定了MgO-B_2O_3二元系熔渣中Mgo的活度,并采用α函数积分法求得了该二元系熔渣中B_2O_3的活度。此外,由B_2O_3和MgO的活度数据估算了复合化合物2MgO·B_2O_3和3MgO·B_2O_3的标准生成自由能。
The activity of MgO in MgO-B_2O_3 melt was experimentally determinedat 1500 and 1550℃ by means of slag-liquid Sn equilibrium. The activity of B_2O_3was calculated by integrating Gibbs-Duhem equation. The standard Gibbs energies offormation of binary compounds 2MgO·B_2O_3 and 3MgO·B_2O_3 were estimated withthe activity data of components in B_2O_3-MgO melt.
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