摘要
通过掺杂适量水泥原料中常见的Na^+、Si^4+、Fe^3+,利用固相法制备立方晶型无水硫铝酸钙(Ca4Al6SO16,C4A3$),并借助X射线衍射仪、扫描电子显微镜等,研究了Ca4-xNaxAl6-x-yFeySixO12SO4系列产物的物相组成和微结构.结果表明:Na^+的掺杂对立方晶型C4A3$的形成和稳定具有重要影响;当Na^+掺杂量x较低或较高(x=0.1或x=0.4)时,固相法合成的C4A3$主要以正交晶型存在,且有较多副产物形成;当Na^+掺杂量x=0.2或x=0.3、复掺适量Si^4+和Fe^3+时,固相法合成的C4A3$主要以立方晶型存在(含量最高可达80%以上),分别呈现多角形或球形微观形貌.
Through doping with appropriate amount of Na^+,Si^4+and Fe^3+ions,which are common elements in cement raw materials,the cubic calcium sulphoaluminate(Ca4Al6SO16,C4A3$)was prepared by solid state reaction.The phase composition and microstructure of Ca4-xNaxAl6-x-yFeySixO12SO4 were studied by X-ray diffractometry,scanning electron microscopy and several other modern characterization techniques.The results show that Na^+ions has an important role on the formation and stability of cubic C4A3$.When the doping amount of Na^+ions is lower or higher(x=0.1 or x=0.4),C4A3$is mainly of orthorhombic structure with many by-products formation.When the doping amount of Na^+ions is x=0.2 or x=0.3,and the appropriate amounts of Si^4+and Fe^3+ions are mixed,C4A3$mainly exists in a cubic structure(up to more than 80%,mass fraction).The synthetic cubic C4A3$has polygonal and spherical morphology,respectively.
作者
宋飞
吕忆农
殷悦
刘文娟
彭美勋
SONG Fei;Lü Yinong;YIN Yue;LIU Wenjuan;PENG Meixun(College of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411100, China;Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan 411100, China;College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2020年第6期1297-1304,共8页
Journal of Building Materials
基金
国家自然科学基金资助项目(81701837)
湖南省教育厅科学研究项目(19C0729)
湖南科技大学博士科研启动基金项目(E51798)。
关键词
无水硫铝酸钙
微结构
超结构
定量分析
calcium sulphoaluminate
microstructure
superstructure
quantitative analysis
