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

  • Wang Shao-bo 
  • Xu Xiao-wei 
  • Fan Hui-li 
  • Li Yu-ping 
Article

Abstract

Cubic boron nitride(c-BN) was synthesized through benzene thermal method at a lower temperature of 300 °C 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, BCl3 and 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.

Key words

benzene thermal method boron nitride boron trifluoride etherate lithium nitride cubic boron nitride orthorhombic boron nitride hexagonal boron nitride 

CLC number

TQ163 

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Copyright information

© Central South University 2005

Authors and Affiliations

  • Wang Shao-bo 
    • 1
  • Xu Xiao-wei 
    • 1
  • Fan Hui-li 
    • 2
  • Li Yu-ping 
    • 1
  1. 1.School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Applied ScienceUniversity of Science and Technology BeijingBeijingChina

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