METHOD FOR BORON NITRIDE NANOTUBES PRODUCTION Russian patent published in 2017 - IPC C01B21/64 C04B35/5833 B82B3/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: method comprises preparation of a reaction mixture of a boron oxide compound and a catalyst, reaction mixture heat treatment in ammonia at a temperature of 950°C-1200°C for 1 hour, nanotubes selection from the reaction products, washing and drying, at that, the reaction mixture consists of a boron oxide compound and a catalyst taken in a proportion providing cation ratio in the range of B/Me=7.1, where Me=Li, Mg , Ca, Sr, lithium, magnesium, calcium, or strontium hydroxide or carbonate, are used a catalyst, and boric acid or ammonium borate is used as a boron oxide compound, the reaction mixture is applied as a 0.1 to 1 mm thick layer to a closed strip of mild steel or a thin mesh which is passed through the furnace with ammonia atmosphere.

EFFECT: invention allows to obtain discrete cylindrical boron nitride nanotubes, 10-100 nm in diameter and 0,5-50 microns long, using cheap and low toxic reagents in a continuous manner.

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