Nanodiamond Modified Black Powder, is a black powder with its surface modified so that the particles can combine well with oil, grease etc. Average particle size: 4-15 nm Purity: 55%~75% Specific surface area: ~300 m2/g Color: Black Morphology: spherical & flaky True density: 3.05-3.3 g/cm3 Bulk density: 0.16 g/cm3 Application: Used in lubricating, synthesizing rubber, polymeric composites etc.