... industrial refractories, powder metallurgy industry,polysilicon,silicon target material,silicon nitride,silicon carbon bar and semi-conductors. (2 ... , which enjoy good castability and weldability accordingly. silicon carbide Chemical Properties ItemTypical RangePurity(%)99.0Iron(%)0.2Calcium ... 020.020.0023-5um99.990.0020.0010.0001Low-grade silicon powder200 mesh97≤3.0% brandChemical Composition %Si ≥ ...