Al2O3-MgO和Al2O3-MgO-SiO2体系的热力学优化与计算

doi:10.19976/j.cnki.43-1448/TF.2022034

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Abstract Since the thermodynamic parameters of Al₂O₃-MgO binary system in the reported literatures deviated from the experimental data when it was extrapolated to the multivariate system, the calculation of phase diagram (CALPHAD) method was used in this work to re-optimize the system based on the rigorous evaluation of the thermodynamic data. Subsequently, the thermodynamic description of the Al₂O₃-MgO-SiO₂ system was further improved. In the optimization process, the ionic two-sublattice model was used to describe the liquid phase and compound energy formalism (CEF) model was used to describe the solid phase. The results of thermodynamic optimization and calculation of Al₂O₃-MgO and Al₂O₃-MgO-SiO₂ phase diagrams are in good agreement with most experimental data. This work is the basis of constructing a thermodynamic database of Al₂O₃-SiO₂-MgO-CaO-Fe₂O₃-Na₂O system, and can provide guidance for the high-value utilization of bulk aluminosilicate solid waste.

Key words： Al₂O₃-MgO-SiO₂ system Al₂O₃-MgO system thermodynamic optimization CALPHAD phase diagram calculation

Received: 30 March 2022 Published: 14 September 2022

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	MA Tianyi
	LIU Yuling
	GAO Fengyang
	ZHANG Liang
	DU Yong

Cite this article:

MA Tianyi,LIU Yuling,GAO Fengyang, et al. Thermodynamic optimization and calculation of the Al₂O₃-MgO and Al₂O₃-MgO-SiO₂ systems[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(4): 360-371.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022034 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I4/360

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