| 摘要 |
FIELD: abrasive materials. SUBSTANCE: invention can be used for manufacturing cutting and abrasive tools as well as in jewelry industry and aims at reducing unsoundness of crystals achieved by heating them in closed space to raise active gas pressure to 1500 to 10000 atm followed by subsequent alternate reductions and raisings of active gas pressure, temperature being maintained up to 0.7 to 0.9 crystal phase transfer temperature and simultaneously affecting crystals by UV emission within power range 100 to 500 W at the rate 5 W/min. UV treatment is accompanied by ultrasonic treatment, whereas active gas treatment, UV emission power, and ultrasound frequency are varied according to harmonic oscillation low. EFFECT: improved structural perfection of crystals due to removed part of defects: stresses, dislocations, pores, and other, including A defects caused by single replacing nitrogen atoms. 7 cl, 2 ex
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