METHOD OF PRODUCING POWDERS OF HIGHLY-PURIFIED DIAMOND Russian patent published in 2021 - IPC B01J3/06 C01B32/25 B82B3/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: invention relates to diamond synthesis, which can be used to produce conductive and superconducting composites. For this purpose, carbon source is nano-globular carbon with particle size of 20–70 nm, and as boron source X-ray amorphous boron with particle size of less than 2 µmol in atomic ratio of boron/carbon from 1/10 to 1/20, is mixed using ethyl alcohol with superposition of ultrasound, air-dried at 100 °C for 1 hour, treated at pressure 3–6 hPa and temperature 1400–1700 °C for 60 s, then treated at pressure of 8 hPa and temperature of 1600–1800 °C for 60 s.

EFFECT: method enables to obtain powders of high hardness diamonds doped with boron in concentration higher than 10²¹ atom/cm^-3 and having micron diameters of about 1–10 µmol, and submicron, about 0.1–1 µmol, particle size.

1 cl, 4 dwg, 3 ex