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1.1 Single crystal diamond powder:
1) It is produced by static pressure single crystal diamond type I or II material, mostly metal type.
2) Special micro-powder synthesis process, which can be metal-bonded or resin-bonded.
3) Low-grade synthesis processes, such as 8-minute processes.
Domestic single crystal diamond production: 4-5 billion carats / year, ranking first in the world domestic monocrystalline diamond micropowder production: 400-500 million carats / year (except broken material).
1. 2 polycrystalline (polycrystalline) diamond micropowder: the use of high temperature and high pressure generated by the explosion of explosives to convert graphite into polycrystalline diamond.
Domestic and international production: about 20-40 million carats / year.
1.3 Detonation of nanodiamonds: Free carbon atoms generated by explosion of explosives under conditions of negative oxygen balance, forming nanoscale diamond micropowder under specific conditions.
Domestic and international production: 10-20 million carats / year, high production capacity.
Second, the application situation of diamond micropowder
2.1 Traditional gemstone polishing: Single crystal micropowder or abrasive paste of about 3um is a traditional use, and the prospect is stable.
2.2 Ceramic processing: single crystal or polycrystalline micropowder can be used. For example, fiber optic ceramic ferrule: micron to submicron single crystal micropowder, application products include grinding wheel, polishing liquid and polishing film. The application prospects in this regard are good.
2.3 Grinding and polishing of fiber optic connectors: micron to submicron, polished film.
2.4 Texture processing of glass hard disk: Submicron to nanometer, polycrystalline or nano diamond polishing liquid, however, with the conversion of horizontal magnetic recording to perpendicular magnetic recording technology, the usage is drastically reduced!
2.5 Texture processing of aluminum-based hard disk: sub-micron to nano-, single crystal and detonation nano-diamond polishing liquid, with the conversion of horizontal magnetic recording to perpendicular magnetic recording technology, the usage is also decreasing!
2.6 Magnetic head: Grinding and polishing such as GMR head, submicron to nanometer, polishing liquid / polishing film.
2.7 Grinding and polishing of sapphire wafers: micron to submicron, polycrystalline/single crystal polishing liquid With the rapid development of LED, the prospect is very good!
2.8 Grinding and polishing of super-hard metal rolls or devices: Micron to sub-micron, polishing film/grinding paste/grinding wheel is stable.
2.9 Polishing of metal molds: micron to submicron, diamond polishing liquid / abrasive paste is stable.
2.10 Sintered PCD raw materials: micron-sized micro-powder with the expansion of the application of PCD tools, the prospects are broad!
2.11 Raw materials for various grinding tools: single crystals of various sizes, there is still a broad space for development!
Production and application of diamond micropowder
First, the production situation of diamond micropowder