Low pressure synthesis of boron nitride with (C₂H₅)₂O·BF₃ and Li₃N precursor^①

来源期刊：中南大学学报(英文版)2005年第1期

论文作者：王少波 徐晓伟 范慧丽 李玉萍

文章页码：60 - 63

Key words：benzene thermal method; boron nitride; boron trifluoride etherate; lithium nitride; cubic boron nitride; orthorhombic boron nitride; hexagonal boron nitride

Abstract: Cubic boron nitride(c-BN) was synthesized through benzene thermal method at a lower temperature of 300℃by selecting liquid (C₂H₅)₂O·BF₃ and Li₃N as reactants. Hexagonal boron nitride(h-BN) and orthorhombic boron nitride(o-BN) were also obtained. The samples were characterized by X-ray powder diffractometry and Fourier transformation infrared spectroscopy. The results show that all the BF3, BCl₃and BBr₃ in the same family compounds can react with Li3N to synthesize BN since the strongest bond of B—F can be broken. Compared with BBr₃,liquid (C₂H₅)₂O·BF₃ is cheaper, less toxic and more convenient to operate. Li₃N not only provides nitrogen source but also has catalytic effect on accelerating the formation of c-BN at low temperature and pressure.