Phase equilibria of the PbO-SiO2 system have been established for a wide range of compositions: (a) liquid in equilibrium with silica polymorphs (quartz, tridymite and cristobalite) between 740°C and 1580°C, at 60-90 mol.% SiO2; (b) with lead silicates (PbSiO3, Pb2SiO4 and Pb11Si3O17) and lead oxide (PbO) between 700°C and 810°C. A high-temperature equilibration/quenching/electron probe X-ray microanalysis (EPMA) technique has been used to accurately determine the compositions of the phases in equilibrium in the system. Significantly, no liquid immiscibility has been found in the high-silica range, and the liquidus in this high-silica region has been accurately measured. The phase equilibria information in the PbO-SiO2 system is of practical importance for the improvement of the existing thermodynamic database of lead-containing slag systems (Pb-Zn-Fe-Cu-Si-Ca-Al-Mg-O). This article is protected by copyright. All rights reserved.

中文翻译：

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PbO-SiO2 系统的实验相平衡研究

PbO-SiO2 系统的相平衡已经建立，适用于多种成分：(a) 在 740°C 和 1580°C 之间与二氧化硅多晶型物（石英、鳞石英和方石英）平衡的液体，60-90 mol.%二氧化硅；(b) 硅酸铅（PbSiO3、Pb2SiO4 和 Pb11Si3O17）和氧化铅 (PbO) 在 700°C 和 810°C 之间。高温平衡/淬火/电子探针 X 射线微量分析 (EPMA) 技术已用于准确确定系统中平衡相的组成。值得注意的是，在高二氧化硅范围内没有发现液体不混溶性，并且该高二氧化硅区域的液相线已被准确测量。PbO-SiO2 体系中的相平衡信息对于改进现有的含铅渣体系（Pb-Zn-Fe-Cu-Si-Ca-Al-Mg-O）热力学数据库具有重要的实际意义。本文受版权保护。版权所有。