本文对管道反应制备的纳米微晶ZrO2（Y2O33mol％）粉末的模压数据进行处理．结果表明，该ZrO2粉末压形规律遵循黄培云压形方程．根据黄培云压形方程计算出纳米微晶ZrO2陶瓷粉体的压制模量为11．9～12．7MPa，压制过程的非线性指数为7．15．成形剂量的增加将降低粉末体的压制模量，而其非线性指数却保持不变．结合ZrO2压坯的孔隙、孔径测定，分析得出纳米微晶ZrO2粉末理想的成形压力范围应在40-140MPa；这为纳米微晶ZrO2粉末压形提供了理论基础．
The authors dealt with the compaction data of ZrO2 (3wt% Y2O3) nanocrystalline powders preparated by tubular reactor. The results indicate that
the compaction law of these powders conforms to Huang Peiyun Double Logarithmic Equation. According to the equation, the compaction performance
parameters of the powders calculated are the compaction module of 11.9MPa to 12.7MPa and the nonlinear exponent of 7.15. The compaction
module of the powder is decreased with increasing of binder, and the nonlinear exponent keeps almost unalterble. By combining with testing the ZrO2
green compact pore size, analyses indicate that the ideal compacting pressure of the nanocrystalline ZrO2 powders is from 40MPa to 140MPa, and
thus the theoretical criterion for selection the compacting pressure of the nanocrystalline ZrO2 powders can be provided.
参考文献
| [1] | Lange F F. J. Am. Ceram. Soc., 1984, 67 (2): 83--89 2 SHI Jianlin, Gao Jianhua, Lin Zuxing. J. Am. Ceram. Soc., 1991, 74 (5): 994--997 3 施剑林, 高建华, 林祖纕, 严东生. 硅酸盐学报, 1993, 21 (5): 413--420 4 黄培云. 粉末冶金原理. 北京: 冶金工业出版社, 1992. 182--189 5 许煜汾. 粉体技术(特刊). 第五届全国颗粒制备与处理学术会议, 1997, 5: 115--120 6 钱刚. 静态混合管式反应器制备纳米微晶ZrO2粉末的研究. 硕士学位论文. 合肥工业大学, 1998. 2 7 张汝珍, 蒋正典, 程继贵. 粉末冶金技术, 1992, 10 (4): 295--300 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%