### Effects of Ball Size on the Grinding Behavior of Talc ...

manufacturing is required. In this study, we investigate the e ect of the ball size in a high-energy ball mill on the comminution rate and particle size reduction. High-energy ball milling at 2000 rpm produces ultraﬁne talc particles with a surface area of 419.1 m2/g and an estimated spherical diameter of 5.1 nm.