METHOD FOR PREPARING BORON NITRIDE BY USING SELF PROPAGATING HIGH-TEMPERATURE SYNTHESIS

摘要

PURPOSE: A method for preparing boron nitride by using a self-propagating high-temperature synthesis is provided which simply prepares the boron nitride from relatively cheap boron oxide. CONSTITUTION: The method comprises steps of: (i) mixing boron oxide powder, a fixed quantity of magnesium powder and diluent powder; (ii) after putting the mixture in a self-propagating high-temperature synthesizing reactor and filling the reactor with nitrogen gas to make the pressure of the reactor become 50-80, igniting the reactor to cause a self-propagating high-temperature synthesizing reaction; and (iii) after cooling the reactor and removing the gas from the reactor, taking the reaction product out of the reactor.