Diamond nanoparticles powder can be applied for thermal conductive, heat dissipation. 

Diamond has high thermal conductivity, which is the highest among known mineral du. Diamond is a colorless octahedral crystal, which is linked by carbon atoms with four valence bonds. In diamond crystals, carbon atoms are connected to each other in a tetrahedral bond to form an infinite three-dimensional framework. It is a typical atomic crystal. Each carbon atom forms a covalent bond with the other 4 carbon atoms via sp3 hybrid orbital to form a regular tetrahedron. Due to the strong C-C bond in diamond, all valence electrons participate in the formation of covalent bonds, and there are no free electrons. This stable lattice structure makes carbon atoms have excellent thermal conductivity.

Diamond is the material with the highest thermal conductivity in nature. The thermal conductivity (Type Ⅱ Diamond) can reach 2000 W/(mK) at room temperature, and the thermal expansion coefficient is about (0.86±0.1)*10-5/K , And insulated at room temperature. In addition, diamond also has excellent mechanical, acoustic, optical, electrical and chemical properties, which makes it have obvious advantages in the heat dissipation of high-power optoelectronic devices, which also shows that diamond has great application potential in the field of heat dissipation.

Also nano diamond powder can be applied for Super hard materials, lubrication, grinding, etc.