Articles
  • Combined effect of Fe2O3 and Cr2O3 on the structure and properties of glass-ceramics prepared from Baotou steel blast furnace slag

  • Guangyu Wanga, Yongsheng Dua,*, Jie Maa, Hongxia Zhanga, Shunli Ouyangb, Leibo Dengb, Hua Chena and Ming Zhaob

  • aCollege of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China
    bKey Laboratory of Integrated Exploitation of Bayan Obo Multi-Metallic Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

CaO-MgO-Al2O3-SiO2 glass-ceramics were successfully prepared using Baotou Steel BFS as the raw materials, choosing Fe2O3 and Cr2O3 as nucleating agents. This paper focused on analyzing the combined effect of Fe2O3 and Cr2O3 on the structure and properties of the glass-ceramics. Experimental results showed that the crystallization mechanism of glass-ceramics converted surface crystallization into bulk crystallization and the main crystalline phase of glass-ceramics changed gradually from augite to diopside with the decrease of Fe2O3/Cr2O3 ratios. Therefore, an appropriate ratio of Fe2O3/Cr2O3 can act as nuclei for crystallization of augite with integrated interlocking crystal structure and the physicochemical properties of glass-ceramic can be improved. Consequently, the fracture mode of glass-ceramic was changed from intercrystalline to mixed transcrystalline/intercrystalline and therefore the average crack length can be shortened. Glass-ceramic with Fe2O3/Cr2O3 ratio of 1 had a high bending strength of 138.93 MPa, Vickers hardness of 7.51 GPa and acid resistance of 97.75%


Keywords: Baotou steel blast furnace slag, glass-ceramic, combined effect, composite nucleating agents

This Article

  • 2021; 22(6): 665-674

    Published on Dec 31, 2021

  • 10.36410/jcpr.2021.22.6.665
  • Received on May 27, 2021
  • Revised on Sep 10, 2021
  • Accepted on Sep 11, 2021

Correspondence to

  • Yongsheng Du

  • College of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China
    Tel :+86-472-5954358 Fax: +86-472-5954358

  • E-mail: dys1111@imust.edu.cn