METHOD OF PRODUCING CUBIC BORON NITRIDE, HAVING LIGHT EMISSION Russian patent published in 2010 - IPC C01B21/64 C09K11/64 C30B1/12 C30B29/38 

FIELD: chemistry.

SUBSTANCE: invention relates to production of materials capable of intense emission of light in a broad spectral range under the effect of photo-, electron- and electro-excitation, where the emission is stable at high temperature, radiation and in chemically aggressive media. The invention can be used in making light emitters and radiation detectors. A growth mixture based on hexagonal boron nitride is mixed with activators - rare earth metal compounds whose melting point is lower than fusion point of cubic boron nitride, in amount of 0.05-15% of the weight of the growth mixture. The mixture is then exposed to high pressure and temperature. Cubic boron nitride is obtained in form of micropowder, powder, crystals and ceramic samples. Gadolinium compounds are used the activator to obtain light emission in the ultraviolet range; cerium compounds are used to obtain emission in the ultraviolet, blue and yellow ranges; samarium compounds are used for the orange range; neodymium, praseodymium, erbium, ytterbium or holmium compounds are used to obtain emission in the infrared range. To obtain cubic boron nitride having electroluminescence, sulphur or selenium is added to the mixture.

EFFECT: invention widens the spectral range of light emission of cubic boron nitride.

7 cl, 3 dwg, 14 ex