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<p>A large amount of gasification slag and fly ash (referred to as coal-based solid waste, CBSW) will occupy farmland, pollute the environment, and seriously harm people’s physical and mental health. So, to alleviate the environmental pollution, CBSW CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> (CAS) glass-ceramics with an anorthite phase as the main crystalline phase were prepared by the melting method, and the influence of CBSW content on the crystallization ability and phase composition was investigated. The results show that the crystallization temperature (T<sub>p</sub>), the number of anorthite crystalline, the precipitated crystal structure, and morphology also changed. Optimizing the raw material ratio under CBSW content is 40%, the highest amount of anorthite was generated, and most plate-like crystals were precipitated with better morphological development, and the bending strength and Vickers hardness reach maximum values of 157.63&#xa0;MPa and 7.53 GPa, respectively. This indicates that a certain amount of CBSW could effectively promote the anorthite crystals precipitation, while excessive CBSW inhibits the precipitation of anorthite crystals. The findings contribute significantly to the development of reliable and durable materials for the high utilization of CBSW resources.</p> Graphical Abstract <p></p>

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Study on the Properties of CaO–Al2O3–SiO2 Glass-Ceramics Synthesized from Coal-Based Solid Waste

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Runze Liu,
  • Yi Guo,
  • Zhu Chang,
  • Mengduan Zhao,
  • Zhichuan Li,
  • Shuming Wang

摘要

A large amount of gasification slag and fly ash (referred to as coal-based solid waste, CBSW) will occupy farmland, pollute the environment, and seriously harm people’s physical and mental health. So, to alleviate the environmental pollution, CBSW CaO–Al2O3–SiO2 (CAS) glass-ceramics with an anorthite phase as the main crystalline phase were prepared by the melting method, and the influence of CBSW content on the crystallization ability and phase composition was investigated. The results show that the crystallization temperature (Tp), the number of anorthite crystalline, the precipitated crystal structure, and morphology also changed. Optimizing the raw material ratio under CBSW content is 40%, the highest amount of anorthite was generated, and most plate-like crystals were precipitated with better morphological development, and the bending strength and Vickers hardness reach maximum values of 157.63 MPa and 7.53 GPa, respectively. This indicates that a certain amount of CBSW could effectively promote the anorthite crystals precipitation, while excessive CBSW inhibits the precipitation of anorthite crystals. The findings contribute significantly to the development of reliable and durable materials for the high utilization of CBSW resources.

Graphical Abstract