【摘要】 用石墨为还原剂,将渣中La₂O₃还原入液态Sn,以测定1500℃下La₂O₃-CaF₂和La₂O₃-CaF₂-CaO-SiO₂渣中La₂O₃的活度.对La₂O₃-CaF₂系,并用Gibbs-Duhem积分法求得CaF₂的活度. 根据液态渣的离子结构模型,对上述二渣系中La₂O₃的活度数据进行了简单的讨论.更多还原

【Abstract】 The activity of La₂O₃ in liquid La₂O₃-CaF₂ and La₂O₃-CaF₂-CaO-SiO₂ slagshas been determined at 1500℃ y equilibrating the slags with liquid tin in agraphite crucible under one atmosphere of carbon monoxide. From the ctivitydata on the La₂O₃-CaF₂ system, the activity of CaF₂ has been obtained by Gibbs-Duhem integration. The activity ata on the above mentioned slags are briefly discussed on thebasis of ionic constitution of liquid slags.更多还原