利用离子掺杂固相法煅烧立方晶型硫铝酸钙  

Calcination of Cubic Calcium Sulphoaluminate by Solid State Reaction Method Using Ion Doping

作　　者：宋飞 吕忆农[3] 殷悦 刘文娟 彭美勋[1,2] 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)

机构地区：[1]湖南科技大学材料科学与工程学院,湖南湘潭411100 [2]湖南科技大学新能源储存与转换先进材料湖南省重点实验室,湖南湘潭411100 [3]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《建筑材料学报》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)。

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.

关 键 词：无水硫铝酸钙 微结构 超结构 定量分析 

分 类 号：TQ172[化学工程—水泥工业]