硅酸盐学报2022，Vol.50Issue(11)：2855-2867,13.DOI:10.14062/j.issn.0454-5648.20220124
氧化镁掺杂对铝酸盐形成和水化的影响
Effect of Magnesium Oxide Doping on Formation and Hydration of Aluminate
摘要
Abstract
To investigate the occurrence of periclase in clinker aluminate and reveal the hydration mechanism, aluminates were synthesized via MgO doping at various contents. Their structure and hydrates were characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy. The results indicate that higher sintering temperature and MgO content improve the formation and stability of C4AF and C12F7. A phase separation occurs in molten aluminum phase. The black phase includes the main minerals like C3A and periclase, while glass and yellow phases both have a low MgO content. The hydration heat of aluminate phase in the first day decreases with the increase of MgO content, indicating that MgO doping decreases the hydration rate of aluminate phase. In addition, the layered double hydroxides with a Mg:Al ratio of 2 or 3 appear in the hydration products of aluminate incorporated with MgO.关键词
铝酸盐/氧化镁掺杂/晶体结构/水化/镁铝双金属氢氧化物Key words
aluminate/magnesium oxide doping/crystal structure/hydration/magnesium‒aluminium layered double hydroxide分类
化学化工引用本文复制引用
宋强,聂娇,陈延信,胡亚茹,邓洋,李辉..氧化镁掺杂对铝酸盐形成和水化的影响[J].硅酸盐学报,2022,50(11):2855-2867,13.基金项目
陕西省科学技术研究计划(2021GY-203,2021TD-53,2022GY-418,2022KXJ-008) （2021GY-203,2021TD-53,2022GY-418,2022KXJ-008）
陕西省教育厅重点研发计划(20JS079,20JY040). （20JS079,20JY040）
