Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873K
CaO–Al2O3–CeO2 system is a basic slag system for pyrometallurgical comprehensive utilization of various rare earth (RE) containing slag/tailings resources. The phase diagram of this system is useful for the research and development of related processes; besides, it is also indispensable for the ther...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425017442 |
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| author | Guojie Huo Jiyu Qiu Chengjun Liu |
| author_facet | Guojie Huo Jiyu Qiu Chengjun Liu |
| author_sort | Guojie Huo |
| collection | DOAJ |
| description | CaO–Al2O3–CeO2 system is a basic slag system for pyrometallurgical comprehensive utilization of various rare earth (RE) containing slag/tailings resources. The phase diagram of this system is useful for the research and development of related processes; besides, it is also indispensable for the thermodynamic database of multicomponent rare earth (RE) containing slag systems. In this paper, we employed high-temperature equilibrium experiments and quenching methods followed by scanning electron microscope (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD) to determine the morphology, composition and type of equilibrium phases in the CaO–Al2O3–CeO2 system, respectively. Combining the current work and literature data, three isothermal sections at 1873K (including 2 three-phase fields, 3 two-phase fields and a liquid phase field), at 1773K (including 4 three-phase fields, 4 two-phase fields and a liquid phase field) and at 1673K (including 4 three-phase fields, 3 two-phase fields and a liquid phase field) were clarified. The liquidus projection of the CaO–Al2O3–CeO2 system with primary phase fields and Alkemade lines was obtained. Subsequently, the types and possible temperature ranges of 6 univariant reactions and 3 invariant reactions were discussed, respectively. |
| format | Article |
| id | doaj-art-0c8a3a1f91174c67995cddc7308ae89b |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-0c8a3a1f91174c67995cddc7308ae89b2025-08-20T03:11:46ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01374027403910.1016/j.jmrt.2025.07.086Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873KGuojie Huo0Jiyu Qiu1Chengjun Liu2Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Shenyang, Liaoning Province, 110819, China; School of Metallurgy, Northeastern University, Shenyang, Liaoning Province, 110819, ChinaKey Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Shenyang, Liaoning Province, 110819, China; School of Metallurgy, Northeastern University, Shenyang, Liaoning Province, 110819, China; Corresponding author. Northeastern University, No.11, Alley 3, Wenhua Road, Heping District, Shenyang, Liaoning Province, 110819, China.Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Shenyang, Liaoning Province, 110819, China; School of Metallurgy, Northeastern University, Shenyang, Liaoning Province, 110819, ChinaCaO–Al2O3–CeO2 system is a basic slag system for pyrometallurgical comprehensive utilization of various rare earth (RE) containing slag/tailings resources. The phase diagram of this system is useful for the research and development of related processes; besides, it is also indispensable for the thermodynamic database of multicomponent rare earth (RE) containing slag systems. In this paper, we employed high-temperature equilibrium experiments and quenching methods followed by scanning electron microscope (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD) to determine the morphology, composition and type of equilibrium phases in the CaO–Al2O3–CeO2 system, respectively. Combining the current work and literature data, three isothermal sections at 1873K (including 2 three-phase fields, 3 two-phase fields and a liquid phase field), at 1773K (including 4 three-phase fields, 4 two-phase fields and a liquid phase field) and at 1673K (including 4 three-phase fields, 3 two-phase fields and a liquid phase field) were clarified. The liquidus projection of the CaO–Al2O3–CeO2 system with primary phase fields and Alkemade lines was obtained. Subsequently, the types and possible temperature ranges of 6 univariant reactions and 3 invariant reactions were discussed, respectively.http://www.sciencedirect.com/science/article/pii/S2238785425017442CaO–Al2O3–CeO2Phase equilibriaIsothermal sectionLiquidus projectionRare earthSlag |
| spellingShingle | Guojie Huo Jiyu Qiu Chengjun Liu Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873K Journal of Materials Research and Technology CaO–Al2O3–CeO2 Phase equilibria Isothermal section Liquidus projection Rare earth Slag |
| title | Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873K |
| title_full | Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873K |
| title_fullStr | Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873K |
| title_full_unstemmed | Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873K |
| title_short | Experimental study on phase equilibria of CaO–Al2O3–CeO2 system at 1673∼1873K |
| title_sort | experimental study on phase equilibria of cao al2o3 ceo2 system at 1673∼1873k |
| topic | CaO–Al2O3–CeO2 Phase equilibria Isothermal section Liquidus projection Rare earth Slag |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425017442 |
| work_keys_str_mv | AT guojiehuo experimentalstudyonphaseequilibriaofcaoal2o3ceo2systemat16731873k AT jiyuqiu experimentalstudyonphaseequilibriaofcaoal2o3ceo2systemat16731873k AT chengjunliu experimentalstudyonphaseequilibriaofcaoal2o3ceo2systemat16731873k |