Ultradispersed diamond nanodiamond

In Chapter 2, the development of composite materials based on improved nanodiamonds is reported by P. Ya Detkov, V. A. Popov, V. G. Kuhchikhin and S. I. Chukhaeva. The authors describe methods for improving the quality of diamond nanopowders obtained by detonation synthesis, as well as some commercial applications of nanodiamonds. The authors prove that the synthetic detonation diamond is a promising material that can be used in many fields. Of special interest are its applications in compos ite materials both with a metal and polymer matrix. Commercial production of ultradisperse diamonds (or nanodiamonds) has been developed, and it is synthesized on a scale sufficient for particular industries. 

Diamond particles formed in the detonation synthesis ate 2-6 nm in size. Particles of detonation diamond have a cubic lattice with lattice parameter a = 0.3575 nm (in natural diamond, a = 0.3566 nm). Due to the small size of particles, the detonation diamonds are called ultradisperse diamonds (UDD) or nanodiamonds. 

Nanodiamonds synthesized in the standard process contain nondiamond forms of carbon, metal, and silicon compounds as major impurities. Metal impurities include compounds from the diamond-containing mixture that were not dissolved during oxidation or were formed during purification (mainly chromium hydroxide and major chromium sulfates). Production of pure powders requires additional expenditures, and the effect of this or that impurity on particular consumer properties of ultradisperse diamond remains an open issue. Nanodiamond powders were obtained in a more pure form with respect to ... 

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