含成形剂的纳米微晶ZrO_2粉末压形规律的研究

Compaction Law of Nanocrystalline ZrO_2 Powders with Binder

本文对管道反应制备的纳米微晶ZrO_2（Y_2O_33mol％）粉末的模压数据进行处理．结果表明，该ZrO_2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ZrO_2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ZrO_2压坯的孔隙、孔径测定，分析得出纳米微晶ZrO_2粉末理想的成形压力范围应在40-140MPa；这为纳米微晶ZrO_2粉末压形提供了理论基础．

The authors dealt with the compaction data of ZrOZ (3wt% Y2O3) nanocrystalline powderspreparated by tubular reactor. The results indicate that the compaction law of these powderscollforms to Huang Peiyun Double Logarithmic Equation. According to the equation, the compaction performance parameters of the powders calculated are the compaction module of 11.9MPato 12.7MPa and the nonlinear exponent of 7.15. The compaction module of the powder is decreasedwith increasing of binder, and the nonlinear exponent keeps almost unalterble By combining withtesting the ZrO2 green compact pore size, analyses indicate that the ideal compacting pressure ofthe nanocrystalline ZrO2 powders is from 40MPa to 140MPa, and thus the theoretical criterionfor selection the compacting pressure of the nanocrystalline ZrO2 powders can be provided.