Abstract
In this paper, we respectively added 5 wt% of Na2O and CaCl2 to the CaO–MgO–Al2O3–SiO2 base glass, aiming to analyze the effect of the types of flux, CaCl2, and traditional flux Na2O, on the crystallization behavior and mechanical properties of the sintered glass–ceramics. Besides, 1 wt% of Cr2O3 was added as the nucleating agent to form the Cr-spinel nucleus and promote the bulk crystallization. The CaCl2-bearing glass–ceramics (GC-Cl) showed lower porosity and crystallinity compared with the Na2O-bearing glass–ceramics (GC-Na). After sintering at 950 °C for 1 h, the bending strength, Vickers hardness, and fracture toughness of GC-Cl were 163 MPa, 6.9 GPa, and 2.4 MPa·m1/2, respectively, while they are 191 MPa, 8.2 GPa, and 2.3 MPa·m1/2 for the GC-Na. Although the bending strength and hardness of GC-Cl are lower than that of GC-Na, adding CaCl2 as a flux may provide a route for the comprehensive utilization of CaCl2-bearing wastes.
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This work was financially supported by the State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, China.
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Wang, HY., Li, Y., Jiao, SQ. et al. Effects of Na2O and CaCl2 on the Crystallization and Mechanical Properties of CaO-MgO-Al2O3-SiO2 Glass–Ceramics. J. Sustain. Metall. (2024). https://doi.org/10.1007/s40831-024-00819-0
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DOI: https://doi.org/10.1007/s40831-024-00819-0