In this paper,the feasibility and technology regularity of superfine ADP were studied by two preparation methods of freeze-drying and anti-solvent.
It was found that both methods of direct freezing and spray freezing were able to get superfine ADP powders with small,uniform distribution and weak agglomeration.The particles were finer and more uniform by spray freezing while the solution segregation Phenomena existed in direct freezing.The conditions with low solution concentration,large surfac...