以四甲基氢氧化铵(TMAH)为分散剂, 纳米TiN、亚微米SiC粉体为原料, 分别制备单组分水基料浆及复合料浆, 分析了SiC/纳米TiN复合料浆的分散稳定机制以及喷雾干燥行为. 研究结果表明, TMAH在纳米TiN、SiC颗粒表面形成特征吸附, 通过静电作用和空间位阻协同作用提高颗粒的分散性; 当pH=8、TMAH加入量为0.75wt%时, 复合浆料分散稳定, 喷雾干燥制备的SiC/纳米TiN复合粉体流动性好, 且分布均匀.
The aqueous slurries were prepared usingtetramethyl ammonium hydroxide (TMAH) as dispersant, nano-TiN and submicron SiC
powders as starting materials. The dispersion, stabilization mechanism and spray drying behaviors of SiC/nano-TiN aqueous mixed slurry were analyzed. The results show that TMAH can be absorbed on the surface of nano-TiN and SiC particles, and the dispersibility of particles is cooperatively improved by electrostatic and steric effects. The mixed slurry possesses better dispersion and stabilization when pH value is 8 and the amount of TMAH is 0.75wt%, and the SiC/nano-TiN composite powders prepared by spray drying distribute uniformly with good fluidity.
参考文献
| [1] | Nihara K. J. Ceram. Soc. Jpn., 1991, 99 (10): 947-982. [2] Ohji T, Jeong Y K, Choa Y H, et al. J. Am. Ceram. Soc., 1998, 18 (6): 1453-1460. [3] Stems L C, Zhao J H, Harmer M P. J. Eur. Ceram. Soc., 1992, 10: 473-477. [3] 高 濂, 靳喜海, 郑 珊. 纳米复相陶瓷. 北京: 化学工业出版社, 2004. 18-23. [4] 高 濂, 孙 静, 刘阳桥. 纳米粉体的分散及表面改性. 北京: 化学工业出版社, 2003. 144-204. [5] 郭兴忠, 杨 辉, 王建武. 稀有金属材料与工程, 2004, 33 (Suppl. 3): 53-57. [6] Guo X. Z, Yang H. J. Zhejiang Univ. Sci., 2005, 6 (3): 213-218. [7] 郭兴忠, 杨 辉, 王建武, 等. 中国有色金属学报, 2005, 15 (4): 524-530. [8] Li W, Chen P, Gu M Y, et al J. Eur. Ceram. Soc., 2004, 24: 3679-3684. [9] Mei S, Yang J, Ferreira M F. Colloid. Inter. Sci., 2001, 241: 417-421. [10] 易中周, 黄 勇, 谢志鹏, 等. 硅酸盐学报, 2002, 30 (4): 517-520. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%