Compaction mechanism in pelletizing process was studied, and following results were obtained.
(1) A relationship between pellet density and compacting pressure was derived from a model based on powder particle deformation during the compacting.
(2) The model validity was confirmed experimentally using ionic and metallic crystal powders.
(3) It was found that deformation coefficient, the only empirical constant in the model, is determined by shear modulus of the powder particle for ionic crystal powders.
From these results, it was concluded that the relationship between the pellet density and the compacting pressure can be estimated analytically from the shear modulus for ionic crystal powders.