Alumina balls, alumina ceramic grinding media ball, mill ...
Alumina Balls Product. Alumina ball is made of commercial grade alumina (α aluminium oxide) by cool isostatic pressing and high temperature ( 1480°C) kiln firing sintering. Alumina ball has top 5 outstanding features: High density, g/cm3. Ultrigh hardness, Mohs scale 9, second only to Diamond in mineral.