Influence of Fe2O3 content on the network structure and performance of gangue slag-based diopside glass ceramics
摘要
In response to the demands of circular economy and the resource utilization of industrial solid waste, the solid waste glass ceramics with diopside were prepared using gangue slag as the raw material, and the influence of Fe2O3 content on the network structure and performance of the glass was analyzed. The results show that with the increase in Fe2O3 content, the crystallization temperature and the main structure of glass Qn also changed; the structures of Q0 and Q1 in the glass network relatively increase, the concentration of Q3 decreases, Q2 first increases and then decreases, and the content of Q2 reaches the maximum when the Fe2O3 content is 3%. Meanwhile, the iron elements coexist in the form of Fe2+ and Fe3+, with Fe3+ being dominant; Fe3+ and Fe2+ regulate the glass structure through differences in content and proportion. In the Fe-3 sample, the bending strength, Vickers hardness, and density reach maximum values of 142.44 MPa, 8.16 GPa, and 3.34 g/cm3, respectively. This research provides certain reference significance for the high-value utilization of industrial solid waste in the field of glass ceramics products and promotes the construction of “waste-free cities.”