A cogrinding process represents a possible strategy to improve the bioavailability of poorly watersoluble
drugs because it allows the formation of composite materials (carrier plus drug) where
the drug appears in the form of nanocrystals or in an amorphous phase which competes higher
water solubility. Because of the fact that many drugs are thermolabile, an accurate knowledge
of thermal conditions experienced by a drug during cogrinding is of paramount importance.
Accordingly, this paper is focused on the thermal analysis of a vibrational mill by means of a
mathematical model representing the mill as a sum of parts where temperature is spatially
uniform but changing with time. The only exception is given by the mill bowl where, because of
the low heat conductivity and high thickness of its wall, a two-dimensional heat conduction
problem is solved. The comparison between the model best fitting and the experimental evidences
confirms the reliability of the hypotheses on which the model was built.