Following are the Main Material Properties of Zirconia Grinding Ball :
Composition : Wt% 94.6%ZrO2, 5.4%Y2O3
Specific density : g/cm3 ≥6.02
Hardness(HV) Mohs’ : >8.5
Thermal expansion
Coefficient(20~400) : 10x10 -6 /°C(20-400) 9.6
Elastic modulis GPa : 200
Fracture toughness : MPa.m1/2 9-10
Bending strength : MPa 1150
Grain size um : <0.5
Thermal conductivity : W/(m.k0 3

Advantages of Zirconia Grinding Media:
1) Ultra low wear loss as a result of the transformation-toughening mechanism unique to the yttrium stabilited zirconia(YST) material system
2) Higher grinding efficiency and reduced grinding time due to the higher density of zirconia (compared with alumina and glass)
3) Most durable grinding material, reducing operational cost in the long run. Wear rate substantially lower than Al2O3, CeO2-ZrO2, and MgO-ZrO2 grinding media.