选用Ca(OH)2饱和溶液和AlCl3溶液为初始原料,按Al3+与Ca2+的摩尔比为2.2配成混合溶液,在常温、高pH值下,先合成前驱体铝酸钙水化沉淀物,再经1100℃煅烧制成高活性、高纯度的铝酸钙粉体.煅烧后粉体的XRD分析和SEM观察显示:合成物于1000℃煅烧有大量铝酸钙矿物形成,1100℃时可获得稳定的铝酸钙矿物,它是以CA为主晶相,并含有少量CA2的二元混合物,其中位径d50约为0.66μm,比表面积为13 m2·g-1.
参考文献
| [1] | Fujii K;Kondo W .Kinetic of hydration of monocalcium aluminates[J].Journal of the American Ceramic Society,1986,69(04):361-364. |
| [2] | Singh V K;Ali M M .Formation kinetics of calcium aluminates[J].Journal of the American Ceramic Society,1990,73(04):872-876. |
| [3] | Song T W;Choi S H;Hah Kan K S.Calcium aluminates cements[C].Proceedings of international symposium,London,1998:9-11. |
| [4] | 秦景燕,王玉江,任和平,汪开泰.低温烧成纯铝酸钙水泥的机理研究[J].硅酸盐通报,2002(03):51-54,58. |
| [5] | Morozova L P .Preparation of calcium aluminates by a chemical method[J].Cement and Concrete Research,1988,18:375-388. |
| [6] | Mehmet A Gulgun;Oludele O Popoola et al.Chemical synthesis and characterization of calcium aluminate powders[J].Journal of the American Ceramic Society,1994,77(02):531-539. |
| [7] | Wefers K;Hudson L K;Misra C.Alumina oxides[M].Ullman Encyclopedia of Industrial Chemistry,Vol. A1,1985 |
| [8] | Suzuki K;Nishikawa T;Ito S .Formation of hydrates in the system Cao -Al2O3 -SiO2 -H2O at high pH[J].Cement and Concrete,1985,15:213-224. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%