Diamond micro powder can be divided into many types according to its structure and production method. Polycrystalline diamond powder and nano-polycrystalline diamond are synthesized under the action of a strong transient shock wave formed by the explosion. It consists of micron and sub-micron polycrystals composed of nanocrystals. Polycrystalline is isotropic, has no cleavage surface, impact resistance, and high bending strength, so it not only has the hardness of superhard materials, but also the extraordinary high strength and toughness of nanomaterials. Its dual advantages constitute its unique physical properties and have important applications in high-tech industries and traditional pillar industries. It is mainly used in chips, optical crystals, ultra-fine processing, ultra-fine polishing of large silicon wafers, etc. The spherical polycrystalline diamond powder
has a gray-black appearance and a slight metallic luster.
Single crystal diamond micro powder
The crystal shape is regular and complete hexahedron, which has high strength, toughness, good thermal stability, and strong impact resistance. It is suitable for the manufacture of electroplated products, grinding wheels, polishing and carving of high-grade stone, processing of automobile glass, high-grade furniture, ceramics, cemented carbide and magnetic materials.
Nano diamond micro powder
Nano-sized diamond is composed of diamond particles with nanometer size, that is, one billionth of a meter. It is a new material synthesized by explosive technology in recent years. It not only has the inherent characteristics of diamond, but also has a small size effect, a large specific surface area effect, a quantum size effect, etc., and thus exhibits the characteristics of nanomaterials. After treated with different chemical methods, a variety of different functional groups can be formed on the diamond surface, and this diamond crystal has a high adsorption capacity.
Other uses of nanoscale diamond
It is formulated with advanced abrasive pastes and polishing fluids (it is used for ultra-fine processing of quartz, optical glass, semiconductors, alloys and metal surfaces, which can effectively improve processing accuracy). Preparation of catalyst Detonation-synthesized nano-sized diamond and amorphous carbon have a large specific surface area, contain a wide range of surface functional groups, and are highly active. Using them to formulate catalysts can increase the activity data and promote the interaction of organic compounds.
Preparation of nano-composite structural materials
Compounding nano-level diamond with nano-silicon powder, nano-ceramics and various nano-metals can produce new nano-structured materials. Due to its unique properties, it can manufacture semiconductor devices, integrated circuit components and microcomputer parts.
Diamond powder is a kind of super-hard fine grinding and polishing material in the world today. As far as its particle size is concerned, it belongs to micron, submicron and nano powder. Compared with coarse-grained powders, its specific surface area and specific surface functional groups are significantly increased. Therefore, during the production process, the interaction between the particles is greatly increased. In addition, as the particle size is refined, the defects of the particles themselves are reduced, and the strength is necessarily increased. It can be seen that the production process of diamond fine powder is quite difficult. It is not only the process of particle refinement, but also accompanied by changes in crystal structure and surface physical and chemical properties.
Therefore, the production process of diamond micro powder
is a multi-disciplinary engineering technology issue involving machinery, powder engineering, mechanics, physical chemistry, modern instruments and testing technology.