Effect of Fe₂O₃ on the crystallization behavior of glass-ceramics produced from naturally cooled yellow phosphorus furnace slag

Hong-pan Liu¹，Xiao-feng Huang¹，Li-ping Ma¹，Dan-li Chen¹，Zhi-biao Shang¹，Ming Jiang^1,2

1. Faculty of Environmental Science and Engineering,Kunming University of Science and Technology2. College of Resources and Environment,Yunnan Agricultural University

摘 要：CaO–Al₂O₃–SiO₂（CAS） glass-ceramics were prepared via a melting method using naturally cooled yellow phosphorus furnace slag as the main raw material.The effects of the addition of Fe₂O₃ on the crystallization behavior and properties of the prepared glass-ceramics were studied by differential thermal analysis,X-ray diffraction,and scanning electron microscopy.The crystallization activation energy was calculated using the modified Johnson–Mehl–Avrami equation.The results show that the intrinsic nucleating agent in the yellow phosphorus furnace slag could effectively promote the crystallization of CAS.The crystallization activation energy first increased and then decreased with increasing amount of added Fe₂O₃.At 4wt% of added Fe₂O₃,the crystallization activation energy reached a maximum of 676.374 k J×mol-1.The type of the main crystalline phase did not change with the amount of added Fe₂O₃.The primary and secondary crystalline phases were identified as wollastonite（CaSiO₃） and hedenbergite（Ca Fe（Si₂O₆））,respectively.

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