Black silicon carbide grits are sharp and hard with fast cutting speed. They work for tumbling machines, flat laps, ball mills, and any application requiring coarse or fine grinding grits. Standard grit sequence: Black SiC 60/90 mesh, 220 mesh and 600 mesh. Those silicon carbide grits can be adjusted according to your material and requirements before polishing. For best results, use 800 mesh alumina for pre-polishing before the final polish. The same silicon carbide grit sequence, along with alumina pre-polishing, also applies to vibratory tumblers.

There are several suppliers of amorphous boron powder in China. Most manufacturer can only supply amorphous boron powder with purity 90% 92% 94%. For 95% amorphous boron powder, prices from China suppliers ranged. 

99.9% crystalline boron fraction serve as solid-phase raw materials for alloy targets. Unlike amorphous boron powder, crystalline boron features an ordered structure, lower impurity levels, and superior thermal stability.

Black silicon carbide F14, as a highly efficient abrasive product, is commonly used in the production of grinding wheels, coated abrasives, and fiber disc.

Amorphous boron is an amorphous elemental boron with no long-range ordered crystalline structure. It appears as a dark brown to black fine powder, and its properties differ significantly from crystalline boron.