FIELD: chemistry.
SUBSTANCE: inventions can be used in chemical and jewellery industry. Nitrogen-doped diamond material, obtained in accordance with CVD technology, or representing monocrystal or precious stone, demonstrates difference of absorptive characteristics after exposure to radiation with energy of at least 5.5 eV, in particular UV radiation, and thermal processing at temperature 798 K. Defects into diamond material are introduced by its irradiation by electrons, neutrons or gamma-photons. After irradiation, difference in absorptive characteristics decreases.
EFFECT: irradiated diamond material has absorption coefficient lower than 0,01 cm-1 at 570 nm and is capable of changing its colour.
18 cl, 7 dwg, 11 tbl, 15 ex
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| PROCEDURE FOR PRODUCTION OF DIAMONDS OF FANTASY YELLOW AND BLACK COLOUR | 2010 |
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| OBTAINED BY CHEMICAL DEPOSITION FROM VAPOR PHASE MONOCRYSTALLINE SYNTHETIC DIAMOND MATERIALS, WHICH HAVE UNIFORM COLOUR | 2013 |
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