| Modification of particle interface in MgO–C refractory |
Eun-Hee Kim1, Seunghwa Jeong2, Yeon-Gil Jung1,2, Sang-Chae Jeon1,2, SeungCheol Yang1,2
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1School of Materials Science and Engineering, Changwon National University, 20 Changwondaehak-ro, Changwon, Gyeongsangnam-do, 51140, Republic of Korea
2Department of Materials Convergence and System Engineering, Changwon National University, 20 Changwondaehak-ro, Changwon, Gyeongsangnam-do, 51140, Republic of Korea |
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Received: March 21, 2025; Revised: June 2, 2025 Accepted: June 6, 2025. Published online: July 17, 2025. |
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| ABSTRACT |
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The interface between the particles of a MgO–C refractory was modified by applying an inorganic binder to prevent the deterioration of its thermal and mechanical properties owing to carbon oxidation. MgO powder, antioxidants, and graphite were uniformly mixed with resol resin to fabricate the MgO–C refractory. The mixture was molded via uniaxial compression, cured at 200 °C for 2 h, and immersed in an inorganic binder. Subsequently, changes in the properties of the MgO–C refractory were observed after drying at 100 °C and heat treatment at 1400 °C. The inorganic binder was added as a liquid precursor for efficient penetration into the refractory. This inorganic precursor penetrates between MgO particle gaps and acts as a binder at the interface after heat treatment. In addition, single- and multi-component systems were applied to verify the effect of the inorganic precursor as a binder, which significantly improved the refractory properties by producing amorphous or crystalline phases between the particles after heat treatment. The fracture strength of the refractory dipped in a multicomponent inorganic binder improved by 6 ~ 10-fold, and for the single-component inorganic binder, the thermal expansion of the refractory decreased by twofold. |
| Key words:
MgO–C refractory · Inorganic binder · Interface modification · Fracture strength · Thermal expansion |
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