Abstract
The blank of thermodynamic properties in the CaO-Al2O3-Ce2O3 basic slag system limits the application of rare earth element in relevant materials. In the current work, H, Cp (298 K), and Cp (T) of ternary oxide minerals were estimated using the split-combination method, Neumann–Kopp rule, and Kubaschewski method, respectively. Then, a thermodynamic model for calculating the activity of oxides in the CaO-Al2O3-Ce2O3 system, i.e., the IMCT-ai model, has been developed based on IMCT and by introducing the correction coefficient Fi according to the phase diagram theory. And the relationship between the correction coefficient and the compositions was established. Compared with the IMCT model, the good agreement between the calculated activity by the IMCT-ai model and the reported activity indicated that the IMCT-ai model can be applied to predict the activity of the CaO-Al2O3-Ce2O3 system. Furthermore, iso-activity curves of oxides in the CaO-Al2O3-Ce2O3 ternary systems were estimated at 1500 °C, 1550 °C, and 1600 °C, respectively.
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Acknowledgments
The authors gratefully acknowledge supports by the National Key R&D Program of China [2017YFC0805100], the National Natural Science Foundation of China [No. 51874082], and the National Natural Science Foundation of China- Liaoning Joint Foundation [No. U1908224].
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Manuscript submitted Februray 25, 2021; accepted May 26, 2021.
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Zheng, X., Liu, C. Thermodynamic Properties Assessment of CaO-Al2O3-Ce2O3 System. Metall Mater Trans B 52, 3183–3192 (2021). https://doi.org/10.1007/s11663-021-02245-z
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DOI: https://doi.org/10.1007/s11663-021-02245-z