Yttrium(yttrium oxide,Y2O3)stabilized zirconia(zirconium dioxide,ZrO2)grinding media have high density, super hardnes and excellent fracture toughness, enabling to achieve superior grinding efficiencies compared to other conventioanl lower density media.UrbanMines specializes in producing Yttrium Stabilized Zirconia (YSZ) Grinding Beads Media with the highest possible density and smallest possible average grain sizes for use in semiconductor, grinding media, etc.