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<p>The equilibrium phase relations of the CaO-SiO<sub>2</sub>-TiO<sub>2</sub>-5wt%Fe<sub>3</sub>O<sub>4</sub> system were experimentally investigated at 1400°C in air. High-temperature equilibration-quenching techniques were employed in an electric MoSi<sub>2</sub> resistance heated furnace, with phase composition analysis conducted using an electron probe microanalyzer and X-ray diffraction. A single liquid region, liquid-solid phase equilibria regions (including liquid-tridymite, liquid-rutile, liquid-perovskite, and liquid-wollastonite), and three-phase equilibria regions of liquid-tridymite-rutile and liquid-rutile-perovskite were found. The 1400°C isothermal sections of the CaO-SiO<sub>2</sub>-TiO<sub>2</sub>-5wt%Fe<sub>3</sub>O<sub>4</sub> system in air were projected. The present experimental results exhibited good agreement with the calculation results obtained from FactSage.</p>

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Effect of 5wt% Fe3O4 addition on the phase equilibria of the CaO-SiO2-TiO2 system at 1400°C in air

  • 期刊论文

  • 发表日期：

    2025年3月26日

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  • Junjie Shi,
  • Chenglong Jiang,
  • Yifei Cao,
  • Yumo Zhai,
  • Yuchao Qiu,
  • Hangkai Shi,
  • Maoxi Yao,
  • Jianzhong Li

摘要

The equilibrium phase relations of the CaO-SiO2-TiO2-5wt%Fe3O4 system were experimentally investigated at 1400°C in air. High-temperature equilibration-quenching techniques were employed in an electric MoSi2 resistance heated furnace, with phase composition analysis conducted using an electron probe microanalyzer and X-ray diffraction. A single liquid region, liquid-solid phase equilibria regions (including liquid-tridymite, liquid-rutile, liquid-perovskite, and liquid-wollastonite), and three-phase equilibria regions of liquid-tridymite-rutile and liquid-rutile-perovskite were found. The 1400°C isothermal sections of the CaO-SiO2-TiO2-5wt%Fe3O4 system in air were projected. The present experimental results exhibited good agreement with the calculation results obtained from FactSage.