Phase transformation of boron nitride nanoparticles in aniline under moderate conditions

摘要

In order to synthesize sp(3)-bonded phases wurtzitic boron nitride (wBN) and cubic boron nitride (cBN) at moderate conditions, phase transformations of boron nitride (BN) nanoparticles in aniline have been investigated in terms of temperature, pressure and surface modification by solvothermal hot-press method. The results reveal that sp(3)-bonded phases wBN and cBN formed at quite low temperature (250-280 degrees C) and low pressure (15 similar to 250 MPa) because the incorporation of bonding interactions between aniline and BN nanoparticles have been induce the formation of sp(3)-bonded configurations with minimum energy. A simple model has been proposed to explore the phase transformation mechanism of BN nanoparticles in aniline under hot-press conditions.