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Explosive detonation provides a carbon source, and also provides the high temperature and high pressure conditions necessary for phase change, making the UNF production process simple. In order to recover the detonation solid product - detonation ash, a closed metal container, called an explosion tank, can be used. Hang the detonator explosive at the center of the explosion tank, fill it with inert gas (such as CO 2 , N 2 , etc.), collect the detonation ash after explosion (washable with water), use acid and strong oxidant (such as HClO 4 Removal of non-diamond solid carbon and metal impurities such as graphite , and finally removing the acid and water-soluble impurities with deionized water or distilled water to obtain UFD.
In terms of the UFD generation method, the shock wave method (high-speed graphite washing with a flying plate, a small amount of UFD in the converted diamond) and an explosion method (mixing graphite powder and explosives to prepare an explosive, exploding in an explosion tank, recycling explosion The method of blasting and purifying to obtain diamond) UFD has a small yield and requires a process of separating UFD from the particles.
So far, the detonation method is the only method for industrially producing nanoparticle King Kong UFD.
Preparation technology of ultrafine diamond
Ultrafine diamond (UFD) is the average particle size of nanoscale powder, nano-materials shall be deemed for the twenty-first century material materials sector, the ultrafine diamond double both the importance of the family is the diamond A very promising new member.