Because of non metal charateristic it will not rusting. Besides, it will Not give soft metal dent as stainless steel ball media. 

the zirconia ball media is widely used in zink/zamak/aluminum polishing

 

Application:

1. Metallic Minerals like copper, silver, nickel, gold, zinc etc;
2. Non-metallic minerals like Calcium Carbonate, kaolin clay, zirconium Silicate, TiO₂and other minerals;
3. White pigments, coatings, paints, inks etc;
4. Recommend to be used in stirred mill and ball mill.

5. Polishing of softer metal like aluminum, zink, zamak, copper