... the United States. As follows is information of ceramic ball! Property : Ceramic ball ZrO2 ceramic possesses high strength,high hardness, high ... ,7,8.5,10,12,1520,25,30,35,50Typical Value Property :ItemsValuesUnitComposition94.8%ZrO2+5.2%Y2O3Wt%Density≥5.95g/cm3Fracture ...