Effect of Fe_2O_3 on non-isothermal crystallization of CaO-MgO-Al_2O_3-SiO_2 glass  

Fe_2O_3对CaO-MgO-A1_2O_3-SiO_2玻璃非等温析晶的影响（英文）

作　　者：郁青春[1,2] 燕春培 邓勇[1,2] 冯月斌[3] 刘大春[1,2] 杨斌[1,2] 

机构地区：[1]昆明理工大学冶金与能源工程学院,真空冶金国家工程实验室,云南省有色金属真空冶金重点实验室,昆明650093 [2]昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室,昆明650093 [3]昆明理工大学理学院,昆明650500

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第7期2279-2284,共6页中国有色金属学报（英文版）

基　　金：Projects(51264023,51364020,U1202271)supported by the National Natural Science Foundation of China;Project(IRT1250)supported by the Program for Innovative Research Team in University of Ministry of Education of China;Project(2014HA003)supported by the Science and Technology Leading Talent of Yunnan Province,China

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℃ is associated with transition and the exothermic peak temperature about 1000℃ is associated with crystallization.The crystallization peak temperature decreases with increasing the Fe203 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.采用差示扫描量热法（DSC）研究Fe2O3含量在0-5%范围内的CaO-MgO-Al203-SiO2（CMAS）玻璃的析晶行为及动力学。采用傅里叶红外光谱分析（FT-IR）和X射线衍射分析（XRD）研究其物相结构。结果表明：吸热峰温度760℃为转变温度,放热峰温度1000℃为析晶温度。随着Fe2O3含量的增加,析晶温度降低,析晶机理从二维析晶转变为一维生长,透辉石的衍射峰强度增强。由于Fe2O3的分解,Fe2O3含量为0.5%时析晶温度发生突变。Fe2O3-CaO-MgO-Al2O3-SiO2玻璃中发现Si-O-Si,O-Si-O及T-O-T（T=Si,Fe,Al）的联接结构。

关 键 词：CaO-MgO-Al2O3-SiO2 glass FE2O3 DIOPSIDE CRYSTALLIZATION kinetics 

分 类 号：TQ171.1[化学工程—玻璃工业]