以微硅粉和Al2(SO4)3为反应原料,硫酸钠为反应介质,反应混料分别在800℃、900℃、1000℃和1100℃下煅烧保温1h后,经溶解、过滤、烘干后得到莫来石晶须.利用XRD和FESEM对合成粉体进行物相分析和显微形貌观察,结果表明:1000℃为莫来石晶须最佳的合成温度,样品在经NaOH溶液碱处理后得到的莫来石晶须长度约为3～4μm,直径约为10～30nm.同时对合成莫来石晶须形成机理进行了探讨.
参考文献
| [1] | Shinobu Hashimot;Akira Yamaguchi .Synthesis of needlelike mullites using potassium sulfate flux[J].Journal of the European Ceramic Society,2000,20:397-402. |
| [2] | Zhang Y B;Ding Y P;Gao J Q et al.Mullite fibers prepared by sol-gel method using polyvinyl butyral[J].Journal of the European Ceramic Society,2009,29:1101-1107. |
| [3] | Kat suki H;Furuta S.Preparation and some properties of porous ceramic sheets composed of needlelike mullite[J].Journal of Ceramic Society,1996:1081-1086. |
| [4] | 袁建君;刘智恩;韩玉.奠来石晶须制备新工艺与生长机理[J].无机材料学报,1996:101-106. |
| [5] | Kong L B;Zhang T S;Ma J et al.Mullitization behavior and microstructural development of B2O3-Al2O3-SiO2 mixtures activated by high-energy ball milling[J].Solid State Sciences,2009,11:1333-1135. |
| [6] | 聂建华,张寒,徐满,晏强,梁永和.熔盐法合成莫来石晶须[J].稀有金属材料与工程,2009(z2):1154-1157. |
| [7] | R.M. Khattab;A.M. EL-Rafei;M.F. Zawrah .In situ formation of sintered cordierite-mullite nano-micro composites by utilizing of waste silica fume[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2012(9):2662-2667. |
| [8] | Jan Majling;Peter Znasik et al.Convention and microwave sintering of condensed silica fume[J].Journal of Materials Research,1995,10:2411-2414. |
| [9] | Wei Wang;HongWei Li;KunRong Lai .Preparation and characterization of mullite whiskers from silica fume by using a low temperature molten salt method[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2012(1):92-96. |
| [10] | Pengyu Zhang;Jiachen Liu;Haiyan Du .Molten salt synthesis of mullite whiskers from various alumina precursors[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1/2):447-451. |
| [11] | Wei Wang;HongWei Li;KunRong Lai .Preparation and characterization of mullite whiskers from silica fume by using a low temperature molten salt method[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2012(1):92-96. |
| [12] | 朱伯铨,李雪冬,郝瑞,汪厚植.在硫酸钠熔盐中合成莫来石的热力学研究[J].硅酸盐学报,2006(01):76-80. |
| [13] | 张冰,曹传宝,许亚杰,朱鹤荪.熔盐法合成莫来石晶须[J].无机化学学报,2005(02):277-280. |
| [14] | R. EL OUATIB;S. GUILLEMET;B. DURAND .Reactivity of aluminum sulfate and silica in molten alkali-metal sulfates in order to prepare mullite[J].Journal of the European Ceramic Society,2005(1):73-80. |
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%