Micro silica powder 1.SiO2:90%-98% 2.High electrical resistivity and impermeability 3.Superior resistance to chemical attack Micro silica powder Micro silica powder, also called microsilica or micro silica, is a byproduct of producing silicon metal or ferrosilicon alloys. Silicon metal and alloys are produced in electric furnaces. Silica fume consists primarily of amorphous (non-crystalline) ...