... 4-5um CNPC brand, Factory price silicon powder PROPERTIESSilver gray or Dark gray metallic luster powder. APPLICATIONBe used in metal ceramics, ... size 5um, average size 2um,and so on. High purity silicon powder Polysilicon powder99%,99.9% ,99.95% ,99.99%, 99 ... requirement to produce different particle or different purity of silicon metal powder PACKING AND STORAGEIron barrel or plastic bag package. ...