Georgii Khartcyzov, Maksym Shevchenko, Evgenii Nekhoroshev, Evgueni Jak
{"title":"Integrated experimental and thermodynamic modeling study of phase equilibria in the PbO-CaO-AlO1.5 system in air","authors":"Georgii Khartcyzov, Maksym Shevchenko, Evgenii Nekhoroshev, Evgueni Jak","doi":"10.1111/jace.20351","DOIUrl":null,"url":null,"abstract":"<p>The present study focused on the phase equilibria in the PbO-CaO-AlO<sub>1.5</sub> 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<sub>1.5</sub> system in air, including Ca<sub>3</sub>Al<sub>2</sub>O<sub>6</sub>, Ca<sub>12</sub>Al<sub>14</sub>O<sub>33</sub>, (Ca,Pb)Al<sub>2</sub>O<sub>4</sub>, CaAl<sub>4</sub>O<sub>7</sub>, (Ca,Pb)Al<sub>12</sub>O<sub>19</sub>, Ca<sub>2</sub>PbO<sub>4</sub>, corundum (Al<sub>2</sub>O<sub>3</sub>), lime (CaO), massicot (PbO), Pb<sub>9</sub>Al<sub>8</sub>O<sub>21</sub>, PbAl<sub>2</sub>O<sub>4</sub>, and PbCa<sub>2</sub>Al<sub>8</sub>O<sub>15</sub> primary phase fields as well as the immiscibility gap in the liquidi of Ca<sub>3</sub>Al<sub>2</sub>O<sub>6</sub>, Ca<sub>12</sub>Al<sub>14</sub>O<sub>33</sub>, and (Ca,Pb)Al<sub>2</sub>O<sub>4</sub> 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<sub>1.5</sub> 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<sub>1.5</sub> system was presented for the first time in the complete range of temperatures and compositions.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 5","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the American Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jace.20351","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Integrated experimental and thermodynamic modeling study of phase equilibria in the PbO-CaO-AlO1.5 system in air
The present study focused on the phase equilibria in the PbO-CaO-AlO1.5 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-AlO1.5 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-AlO1.5 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-AlO1.5 system was presented for the first time in the complete range of temperatures and compositions.
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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.
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