Effect of Fe_2O_3 on the crystallization behavior of glass-ceramics produced from naturally cooled yellow phosphorus furnace slag  

作　　者：Hong-pan Liu Xiao-feng Huang Li-ping Ma Dan-li Chen Zhi-biao Shang Ming Jiang 

机构地区：[1]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology [2]College of Resources and Environment,Yunnan Agricultural University

出　　处：《International Journal of Minerals,Metallurgy and Materials》2017年第3期316-323,共8页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Fund for Analyzing and Testing of Kunming University of Science and Technology(Nos.2016P2014607009 and 2016T11304019)

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 Fe2O3on 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 kJ·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 (CaFe(Si2O6)), respectively. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.CaO–Al_2O_3–SiO_2(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 Fe_2O_3 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 Fe_2O_3.At 4wt% of added Fe_2O_3,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 Fe_2O_3.The primary and secondary crystalline phases were identified as wollastonite(CaSiO_3) and hedenbergite(Ca Fe(Si_2O_6)),respectively.

关 键 词：Ceramic materials Chemical activation Crystalline materials Crystallization Differential thermal analysis Furnaces Glass ceramics Iron oxides NUCLEATION PHOSPHORUS Scanning electron microscopy Silicate minerals SLAGS THERMOANALYSIS X ray diffraction 

分 类 号：TQ171.733[化学工程—玻璃工业]