借助DSC、XRD、SEM和TEM等技术探讨了Si-Al-Zr-O(SAZ)系非晶的原位受控晶化过程. 结果表明, SAZ系非晶在900℃左右存在分相, 形成富Si区和富Zr、Al区. 在920~950℃间, 开始成核析出初晶相四方氧化锆, 并从富Al区形成Al-Si尖晶石相. 当温度升高至1000℃时, 莫来石晶相开始生成. 温度进一步升高, Al-Si尖晶石相消失, 四方氧化锆、莫来石成为主晶相, 同时生成了方石英. 其中, 莫来石是通过过渡相Al-Si 尖晶石与非晶二氧化硅反应得到.
The in situ controlled crystallizing process of Si-Al-Zr-O(SAZ) amorphous bulk was investigated by DSC, XRD, SEM and TEM techniques. The amorphous undergoes structural changes by treating at different temperatures. Phase segregation occurs at about 900℃, resulting in the formation of Si-rich and Al, Zr-rich regions. The t-ZrO2 is crystallized from the Al, Zr-rich region at 920--950℃ followed by poorly defined Al-Si spinel. With the increase of temperature up to 1000℃, mullite forms by reaction between Al-Si spinel and amorphous silica. The main crystalline phases identified are t-ZrO2, mullite and some cristobalite with the spinel disappearing above 1000℃.
参考文献
| [1] | 肖汉宁, 彭文琴, 邓春明. 中国陶瓷, 2000, 36 (5): 31--33. [2] 谭小平, 梁叔全, 李少强, 等(TAN Xiao-Ping, et al). 无机材料学报(Journal of Inorganic Materials), 2006, 21 (4): 906--912. [3] Liang Shuquan, Tan Xiaoping, Li Shaoqiang, et al. Nanoscience, 2006, 11 (1): 27--31. [4] 梁叔全, 李少强, 谭小平, 等. 中国有色金属学报, 2005, 15 (9): 1358--1362. [5] Toraya H, Yoshimura M, Somiya S. J. Am. Ceram. Sco., 1984, 67 (6): C-119--C-121. [6] Emilija Tkalcec, Stanislav Kurajica, Hrvoie Ivankovic. J. Europ. Ceram. Soc., 2005, 25 (5): 613--626. [7] Campos A L, Silva N T, Melo F C L, et al. J. Non-Cryst Solids, 2002, 304 (1): 19--24. [8] Mcpherson R. J. Am. Ceram. Soc., 1986, 69 (3): 297--298. [9] Jin Xi-Hai, Gao Lian, Guo Jing-Kun. J. Europ. Ceram. Soc., 2002, 22 (8): 1307--1311. [10] Popa M, JOSe M, Calderon M, et al. J. Non-Cryst. Solids, 2002, 297 (2-3): 290--300. [11] Mackenzie K J D. J. Am. Ceram. Soc., 1972, 55 (2): 68--71. [12] Dong X L, William J T. J. Am. Ceram. Soc., 1990, 73 (4): 964--969. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%