Effect of Fe2O3 on non-isothermal crystallization of CaO-MgO-Al2O3-SiO2 glass

被引:43
|
作者
Yu, Qing-chun [1 ,2 ]
Yan, Chun-pei [1 ,2 ]
Deng, Yong [1 ,2 ]
Feng, Yue-bin [3 ]
Liu, Da-chun [1 ,2 ]
Yang, Bin [1 ,2 ]
机构
[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Key Lab Nonferrous Met Vacuum Met Yunnan Prov, Natl Engn Lab Vacuum Met, Kunming 650093, Peoples R China
[2] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
[3] Kunming Univ Sci & Technol, Fac Sci, Kunming 650500, Peoples R China
基金
中国国家自然科学基金;
关键词
CaO-MgO-Al2O3-SiO2; glass; Fe2O3; diopside; crystallization; kinetics; IRON-OXIDE; CERAMICS; KINETICS; SYSTEM; BEHAVIOR;
D O I
10.1016/S1003-6326(15)63842-0
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The crystallization behavior and kinetics of CaO-MgO-Al2O3-SiO2 (CMAS) glass with the Fe2O3 content ranging from zero to 5% were investigated by differential scanning calorimetry (DSC). The structure and phase analyses were made by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The experiment results show that the endothermic peak temperature about 760 degrees C is associated with transition and the exothermic peak temperature about 1000 degrees C is associated with crystallization. The crystallization peak temperature decreases with increasing the Fe2O3 content. The crystallization mechanism is changed from two-dimensional crystallization to one-dimensional growth, and the intensity of diopside peaks becomes stronger gradually. There is a saltation for the crystallization temperature with the addition of 0.5% Fe2O3 due to the decomposition of Fe2O3. Si-O-Si, O-Si-O and T-O-T (T=Si, Fe, Al) linkages are observed in Fe2O3-CaO-MgO-Al2O3-SiO2 glass.
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页码:2279 / 2284
页数:6
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