Integrated experimental and thermodynamic modeling study of phase equilibria in the PbO-CaO-AlO1.5 system in air

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of the American Ceramic Society Pub Date : 2025-01-03 DOI:10.1111/jace.20351

Georgii Khartcyzov, Maksym Shevchenko, Evgenii Nekhoroshev, Evgueni Jak

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Abstract

The present study focused on the phase equilibria in the PbO-CaO-AlO_1.5 and PbO-CaO systems in air. The high-temperature phase equilibria in these systems were studied using the high-temperature equilibration and quenching technique. The compositions of phases present in the quenched samples were then measured using the electron probe X-ray microanalysis. The liquidus of the PbO-CaO-AlO_1.5 system in air, including Ca₃Al₂O₆, Ca₁₂Al₁₄O₃₃, (Ca,Pb)Al₂O₄, CaAl₄O₇, (Ca,Pb)Al₁₂O₁₉, Ca₂PbO₄, corundum (Al₂O₃), lime (CaO), massicot (PbO), Pb₉Al₈O₂₁, PbAl₂O₄, and PbCa₂Al₈O₁₅ primary phase fields as well as the immiscibility gap in the liquidi of Ca₃Al₂O₆, Ca₁₂Al₁₄O₃₃, and (Ca,Pb)Al₂O₄ have been experimentally characterized. The experimental data obtained were used for the thermodynamic optimization of a self-consistent set of parameters of the thermodynamic model for all phases of the PbO-CaO-AlO_1.5 system in air, in agreement with the Cu-Pb-Zn-Fe-Ca-Si-Al-Mg-O-S-(As, Sn, Sb, Bi, Ag, Au, Ni, Cr, Co, and Na) gas/oxide liquid/matte/speiss/metal/solids system in support of the development and optimization of pyrometallurgical processes. The predicted liquidus projection of the PbO-CaO-AlO_1.5 system was presented for the first time in the complete range of temperatures and compositions.

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空气中PbO-CaO-AlO1.5体系相平衡的综合实验与热力学模拟研究

本研究的重点是空气中 PbO-CaO-AlO1.5 和 PbO-CaO 体系的相平衡。采用高温平衡和淬火技术研究了这些体系中的高温相平衡。然后使用电子探针 X 射线显微分析法测量了淬火样品中的相组成。PbO-CaO-AlO1.5 系统在空气中的液相，包括 Ca3Al2O6、Ca12Al14O33、（Ca,Pb）Al2O4、CaAl4O7、（Ca,Pb）Al12O19、Ca2PbO4、刚玉（Al2O3）、石灰（CaO）、块根（PbO）、Pb9Al8O21、PbAl2O4、和 PbCa2Al8O15 的主相场以及 Ca3Al2O6、Ca12Al14O33 和 (Ca,Pb)Al2O4 的液相中的不溶间隙进行了实验表征。获得的实验数据被用于空气中 PbO-CaO-AlO1.5 系统所有相的热力学模型自洽参数集的热力学优化，该模型与 Cu-Pb-Zn-Fe-Ca-Si-Al-Mg-O-S-（As、Sn、Sb、Bi、Ag、Au、Ni、Cr、Co 和 Na）气体/氧化物液体/熔剂/薄片/金属/固体系统一致，以支持火法冶金工艺的开发和优化。首次提出了 PbO-CaO-AlO1.5 系统在整个温度和成分范围内的液相预测。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.