Fe2O3对CaO-MgO-Al2O3-SiO2玻璃非等温析晶的影响

来源期刊:中国有色金属学报(英文版)2015年第7期

论文作者:郁青春 燕春培 邓 勇 冯月斌 刘大春 杨 斌

文章页码:2279 - 2284

关键词:CaO-MgO-Al2O3-SiO2玻璃;Fe2O3;透辉石;析晶;动力学

Key words:CaO-MgO-Al2O3-SiO2 glass; Fe2O3; diopside; crystallization; kinetics

摘    要:采用差示扫描量热法(DSC)研究Fe2O3含量在0~5%范围内的CaO-MgO-Al2O3-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 °C为转变温度,放热峰温度1000 °C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。

Abstract: 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 °C is associated with transition and the exothermic peak temperature about 1000 °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.

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号