Method for Synthesis of Boron Nitride Nanopowder
AssigneesPolymate, Ltd., MALAXIT Co.
InventorsNugzar Valerianovich Dvali, Jasha Mihailovich Tabatadze, Oleg Lvovich Figovsky
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Abstract
A reaction is carried in a gaseous phase between ammonia (NH3) and boron trifluoride (BF3) in a cooled reactor under atmospheric pressure. A boron trifluoride-ammonia complex (NH3.BF3) obtained in this reaction is thermally decomposed at a temperature in the range of 125 to 300° C. into boron nitride and ammonium tetrafluoroborate in accordance with the following scheme: 125-300° C. 4NH3.BF3→BN+3NH4.BF4 BN is then separated from the mixture of BN with 3NH4.BF4 by combining the mixture with deionized water, forming a suspension, and separating the suspended BN nanoparticles by centrifugation.
Claims15
A method for synthesis of boron-nitride nanopowder comprising the steps of:
- conducting a reaction between gaseous ammonia and a gaseous boron trifluoride for obtaining a boron trifluoride-ammonia complex in a powdered form;
- thermally decomposing the obtained boron trifluoride-ammonia complex into boron nitride nanoparticles and ammonium tetrafluoroborate;
- and
- and obtaining a boron nitride nanopowder by separating boron nitride nanoparticles from ammonium tetrafluoride.
Dependencies are inferred from the claim text.