Effect of surface properties of MgO on its dissolution and spinel growth in CaO–SiO2–Al2O3 slag. Issue 11 (1st June 2022)

• Record Type: Journal Article
• Authors: Yoon, Cheol Min; Min, Dong Joon
• Is Part Of: Ceramics international. Volume 48:Issue 11(2022)
• Page Start: 15017
• Page End: 15025
• Publication Date: 2022-06-01
• Subjects: MgO -- MgAl2O4 spinel -- Surface properties -- Dissolution behavior -- Gibbs–Thomson equation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.02.030
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The dissolution behavior of MgO in CaO–SiO2 –Al2 O3 ternary slag at the interface of single-crystal, dense poly-crystal, and porous poly-crystal MgO was investigated to evaluate the effect of the surface properties of the MgO. The experimental results revealed that a detached spinel layer formed at the MgO interface due to the change in thermodynamic condition of the slag, which was independent of the surface properties. On the other hand, it was also confirmed that the growth rate and morphology of the detached spinel layer strongly depended on the surface properties, such as porosity and curvature of MgO. During the formation of the spinel layer at the interface during MgO dissolution, a kinetic approach adopting parabolic relation theory was employed to determine the correlation between the surface properties and the spinel growth mechanism.