Agglomeration und Strukturänderung bei der Mahlung

Agglomeration and structural changes can cause damage to products during dry and wet grinding. During impact comminution in rotor and jet mills, damage is caused by the formation of agglomerates as a result of the high adhesive forces of the fine particles and the degradation or breakdown of the chemical compound owing to the high temperatures at crack tips on nanometre and picosecond scale. This paper also reports on the agglomeration and flocculation processes that take place during ultrafine comminution in stirred ball mills and are caused by interfacial characteristics. Especially for comminution to nanometre scale, a stabilization of the particles produced is of great importance.