It is used for glass industry, ceramics, glaze and coloration. It is used for glass industry, ceramics, glaze and coloration.Name: Erbium Oxide StandardGB/T 15678-1995 Main ContentEr2O3/TREO(%) ≥ 99.99TREO(%) ≥ 99 ≤ RE impurities(%) ≤ Non-RE impurities Item Index Item IndexGd2O30.0005Fe2O33Tb4O70.0005SiO225Dy2O30.001CaO6Ho2O30.003CuO2Tm2O30.002NiO1Yb2O30.001PbO5Y2O30.001Cl -90Lu2O30.001 Erbium ...