マルチリング型超微粉砕機によるタルクの微細化とメカニカル活性化の相関

抄録

The correlation between size reduction and mechanical activation in the wet grinding of talc was studied using a multi-ring media mill. The intensity of the compressive force exerted by the grinding rings of the mill was controlled by changing the material of the grinding rings, i. e., those made of tungsten carbide alloy (WC), stainless steel (SUS), partially stabilized zirconium oxide (ZrO₂) and polyoxy methylene (POM). Products were characterized by median particle size, D, specific surface area, S, fractional amorphization and 50% dehydration temperature. Both size reduction and agglomeration were observed under high compressive force leading to a stationary state. The apparent rate of fractional amorphization was almost proportional to the increase in the compressive force. The decrease in 50% dehydration temperature changed linearly with the degree of apparent fractional amorphization.