Phase equilibria studies have been undertaken first time in the system PbO-“FeO_x”-CaO-SiO₂-ZnO-Al₂O₃. Pseudo-ternary section of the phase diagram “Fe₂O₃”-ZnO-(PbO + CaO + SiO₂) with CaO/SiO₂ weight ratio of 0.93 and PbO/(CaO + SiO₂) weight ratio of 2.0 at fixed 4 wt% Al₂O₃ has been constructed by equilibration and quenching technique. Zincite, spinel, melilite and Ca₂SiO₄ are the major primary phases in the temperature and composition ranges investigated. It was found that, Al₂O₃ stabilizes the spinel and melilite phases and extents their primary phase fields. The liquidus temperatures are increased in the spinel primary phase filed and decreased in the zincite primary phase field with increasing Al₂O₃. Significant difference of the liquidus temperatures is observed between the experimental data and FactSage calculations. Accurate compositions of the solid solutions have been determined in the present study together with the accurate temperature and liquid compositions. This study can provide direct support for industrial practice and optimization of the thermodynamic database.

首次在 PbO-“FeO _x ”-CaO-SiO ₂ -ZnO-Al ₂ O ₃系统中进行了相平衡研究。相图的伪三元截面“Fe ₂ O ₃ ”-ZnO-(PbO + CaO + SiO ₂ )，CaO/SiO ₂重量比为 0.93，PbO/(CaO + SiO ₂ ) 重量比为 2.0，固定为 4 wt% Al ₂ O ₃已经通过平衡和淬火技术构建。在所研究的温度和组成范围内，锌矿、尖晶石、黄长石和 Ca ₂ SiO ₄是主要的主要相。结果表明，Al ₂ O₃稳定尖晶石和黄长石相并扩展它们的主要相场。随着Al ₂ O _{3 的}增加，尖晶石初相场液相线温度升高，红锌矿初相场液相线温度降低。在实验数据和 FactSage 计算之间观察到液相线温度的显着差异。在本研究中已经确定了准确的固溶体组成以及准确的温度和液体组成。该研究可为工业实践和热力学数据库的优化提供直接支持。