... , high hardness, wearable and stable. 2.widely used as disperser, grinding me 1) Product Function With the advantages of smooth surface ... size, high hardness, wearable and stable, widely used as disperser, grinding media and filler materials in day, paint, ink and chemical ... b.grade ZQ021 SiO2 73.54 PbO 0.07 Al2O3 4.30 ZrO 0 Fe2O3 0.10 ZnO 0 CaO 7 ... .75 NaO 11.42 PH:7.2 Glass Bead for grinding