... nanoparticles are pale grey to black, no other color mixed, ball shape, no obvious agglomerate.Metallic nano lubricating additives: ... of microelectronics devices.high purity, uniform size and shape of the ball, good dispersion, the sintering shrinkage ... purity, high uniformity of particle size, Spherical + Rodlike shape, good dispersion, high temperature oxidation, small sintering shrinkagePackage: ...