Silica fume, also known as microsilica or silicon ash, is an amorphous (non-crystalline) polymorph of silicon dioxide. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production. The main field of application is as pozzolanic material for high performance concrete.
It is sometimes confused with fumed silica (also known as pyrogenic silica). However, the production process, particle characteristics and fields of application of fumed silica are all different from those of silica fume.
Silicon metal factory direct sales silica fume
Dark gray or white
85#; 88#, 90#, 94#, 97#
As pozzolanic material for high performance concrete -- Property enhancer