Nano powder, also called superfine powder or superfine powder, generally refers to powder or particle below 100 nm, which is a solid particle material between atoms, molecules and macro objects in the middle state. Can be used for high density magnetic recording material,radar absorbing stealth materials, magnetic fluid materials, radiation proof materials, polishing materials for single crystal silicon and precision optical devices, micro chip thermal conductive substrate and wiring material, microelectronic packaging materials, optoelectronic materials, advanced battery electrode materials, solar cell materials, high efficient catalyst; high efficiency combustion improver, sensitive element, high toughness ceramic materials,etc.