PRODUCTION OF BORON NITRIDE BY CARBOTHERMIC AND MECHANOCHEMICAL METHODS, AND NANOTUBE FORMATION

摘要

The formation of hexagonal boron nitride by carbothermic reduction of boron oxide and nitridation has been examined. Experiments were conducted in the temperature range of 1100-1500℃ for durations between 15-240 minutes. Products were examined by X-ray, SEM and chemical analysis. The results showed that the reaction proceeds through a gaseous boron containing species, which is most probably B_2O_3(g). It was found that all of the carbon was consumed and formation of boron nitride was complete in 2 hours at 1500℃.