| 摘要: |
| 通过掺杂适量水泥原料中常见的Na+、Si4+、Fe3+，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=01或x=04)时，固相法合成的C4A3$主要以正交晶型存在，且有较多副产物形成；当Na+掺杂量x=02或x=03、复掺适量Si4+和Fe3+时，固相法合成的C4A3$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. |
| 关键词: 无水硫铝酸钙 微结构 超结构 定量分析 |
| DOI：103969/j.issn.1007 9629202006006 |
| 分类号: |
| 基金项目: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) |
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| Calcination of Cubic Calcium Sulphoaluminate by Solid State Reaction Method Using Ion Doping |
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SONG Fei1, L Yinong2, YIN Yue1, LIU Wenjuan1, PENG Meixun1
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1.College of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411100, China;2.College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
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| Abstract: |
| Through doping with appropriate amount of Na+, Si4+ and Fe3+ 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=01 or x=04), C4A3$ is mainly of orthorhombic structure with many by products formation. When the doping amount of Na+ ions is x=02 or x=03, and the appropriate amounts of Si4+ and Fe3+ 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. |
| Key words: calcium sulphoaluminate microstructure superstructure quantitative analysis |
