Investigation of Glass-Ceramics Based on Steel Slag under Various Sintering Atmospheres

Abstract:

Slag glass-ceramics were successfully prepared by cold pressing sintering method in different atmospheres from metallurgical solid wastes. The evolution of crystal microstructure and crystalline phase transition of slag glass-ceramics was investigated by thermo-gravimetric analysis (TG-DTA), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) coupled with Energy Dispersive X-ray spectrometer (EDX). The results indicate that the Na₂O composition plays the role of decreasing the crystallization temperature to some extent. Iron oxides make the glass frits have a high driving force to crystallize. This oxidation of ferrum will postpone the process of densification and deteriorate the mechanical properties of product. On the other hand, the slag glass-ceramic products can obtain novel mechanical performance when the samples were sintered under nitrogen atmosphere.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 1784-1790
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.1784
• Online since: December 2014
• Authors: Yan Bing Zong*, Zhao Bo Liu, Jun Jie Hou, Hong Xu Li
• Keywords: Crystallization, Glass-Ceramics, Mechanical Property, Microstructure, Steel Slag

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