铅-铝与铁-银二系统的液态溶解度很小,熔化时分为二层,故可测定银在铅与铝间及铝在铁与银间的分配比。根据文献中已有的分配数据,铅-银相及有关热化学数据,作者等计算了铅-银,银-铝及铁-铝等液态二元系统中的活度。最后作者等算出了铝脱氧反应的平衡常数,与 Gokcen & Chipman 的实验数据大致相符,惟温度系数尚不能确定,有待将来研究。 Lead - aluminum and iron - silver two liquid solubility of the system is very small, melting is divided into two layers, it can be measured silver in the lead and aluminum and aluminum in the distribution ratio of iron and silver. Based on the available data in the literature, the lead-silver phase and related thermochemical data, the authors calculated the activity in liquid binary systems such as lead-silver, silver-aluminum and iron-aluminum. Finally, the authors calculated the equilibrium constant of the aluminum deoxidation reaction, and Gokcen & Chipman’s experimental data roughly consistent, but the temperature coefficient is not yet determined, to be studied in the future.