Phase equilibria studies in the CaO–SiO2–Al2O3–MgO system with CaO/SiO2 ratio of 0.9. Issue 12 (28th August 2020)

• Record Type: Journal Article
• Authors: Wang, Dongqing; Chen, Mao; Jiang, Yang; Wang, Shuai; Zhao, Zhixing; Evans, Tim; Zhao, Baojun
• Is Part Of: Journal of the American Ceramic Society. Volume 103:Issue 12(2020)
• Page Start: 7299
• Page End: 7309
• Publication Date: 2020-08-28
• Subjects: CaO–SiO2–Al2O3–MgO system -- liquidus temperature -- phase equilibria -- solid solution; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.17421
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Phase equilibria and liquidus temperatures in the CaO–SiO2 –Al2 O3 –MgO system at a CaO/SiO2 weight ratio of 0.9 in the liquid phase have been experimentally determined employing high‐temperature equilibration and quenching technique followed by electron probe X‐ray microanalysis. Isotherms at 1573, 1623, 1673, and 1773 K were determined and the primary phase fields of wollastonite, melilite, olivine, periclase, spinel, and corundum have been located. Compositions of the olivine and melilite solid solutions were analyzed and discussed. Comparisons between the newly constructed diagram, existing data, and FactSage predicted phase diagrams were performed and differences were discussed. The present study will be useful for guidance of industrial practices and further development of thermodynamic modeling.