"Explosion technology"— scientific and technical journal

Physico-chemical aspects of detonation production of carbon and diamond nanomaterials

Keywords:nanodiamond, detonation synthesis, crystallites, microstructure, grain size, ultrasonic treatment, agglomerates

Energy-saturated materials are a source of cheap energy, and detonation synthesis is a new promising type of basic technology for obtaining nanodiamonds and other super hard and ceramic nanomaterials. Nanodiamonds (ND) are a unique product that combines both the properties of diamond and the advantages of nanostructures. In this work, we studied the synthesis products obtained under industrial conditions during the detonation of charges of trinitrotoluene with RDX and RDX with graphite. The sizes of crystallites were estimated by X-ray diffraction analysis, the grain size of particles according to measurements of the specific surface area, and stable agglomerates in an aqueous suspension. The evolution of particle sizes and microstructure of nanodiamonds is shown, both in the products of primary synthesis and after enrichment from non-diamond forms of carbon and technological impurities. Detonation synthesis diamonds are formed in the chemical reaction zone, the rest of the carbon structures continue to grow in the Taylor wave. In the process of chemical purification and during calcination, the sizes of crystallites and the grain size of AN increase due to the recrystallization of the amorphous phase. After chemical treatment in an aqueous suspension, stable agglomerates are formed with a size of 0.5 µm to 100 µm. The results obtained can be useful for studying the mechanism of synthesis and practical application of detonation ND.

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