摘要
利用分析纯试剂模拟熔分赤泥调质实验,FactSage软件、X射线衍射仪、热分析仪等设备探索硅铝比对熔分赤泥纤维微观结构与热稳定性的影响规律。结果表明:增大硅铝比,试样开始析晶温度增加,Si-O-Si弯曲振动区域和Si-O-Si反伸缩振动区域红外光谱波数向高波数区域移动,玻璃化转变温度与熔融温度升高。硅铝比增大可使硅氧键形成的网络结构更牢固,同时氧化铝的减少会使铝氧键以铝氧四面体形式存在,让网络结构趋向紧密有助于改善纤维强度与化学稳定性。而且硅铝比对耐热性灵敏度较高,可提升纤维的耐热性及降低制备过程中的熔化温度。通过调整硅铝比来控制无机纤维微观结构形成及耐热性的变化,达到提升纤维品质与降低制备能耗的目的。
Melting and tempering experiments of red mud were simulated by the analytical reagents, the influences of silicon-to-aluminum ratio on the microstructure and thermal stability of molten red mud fibers were explored by FactSage software, X-ray diffractometer, thermal analyzer and other equipment. The results show that with the increasing of ratio of silicon to aluminum, the starting temperature of the sample increases, the Si-O-Si bending vibration region and the Si-O-Si anti-stretching vibration region move to the high wavenumber region, and the glass transition temperature and melting temperature rise. The increase of the silicon-to-aluminum ratio can make the network structure formed by the silicon-oxygen bond stronger, and the decrease of aluminum oxide will make the aluminum-oxygen bond exist in the form of aluminum-oxygen tetrahedron, which makes the network structure more compact and helps to improve fiber strength and chemical stability. Moreover, the silicon-aluminum ratio has a higher sensitivity to heat resistance, which can improve the heat resistance of the fiber and reduce the melting temperature during the preparation process. By adjusting the ratio of silicon to aluminum to control the formation of the microstructure of the inorganic fiber and the change of heat resistance, the purpose of improving fiber quality and reducing energy consumption for preparation is achieved.
作者
邢磊
杜培培
龙跃
XING Lei;DU Peipei;LONG Yue(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;Modern Metallurgical Technique Key Laboratory of Ministry of Education,North China University of Science and Technology,Tangshan 063210,Hebei,China;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2021年第1期9-14,共6页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(5187041349)
唐山市冶金渣资源化利用基础创新团队资助项目(19130209C)。
关键词
熔分赤泥
微观结构
耐热性
无机纤维
melting red mud
microstructure
heat resistance
inorganic fiber
