Abstract: 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.

Key words: nanocrystalline ZrO₂ powders, compaction law, HUANG Peiyun Compaction equation, binder