Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (14): 1411-1414. Previous Articles     Next Articles

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镁热还原催化合成亚稳态立方相氮化硼e-BN纳米多晶粉

王吉林,潘新叶,谷云乐*   

  1. (武汉工程大学材料科学与工程学院 武汉 430073)
  • 投稿日期:2009-04-14 修回日期:2010-01-06 发布日期:2010-03-22
  • 通讯作者: 谷云乐 E-mail:ncm@mail.wit.edu.cn

Magnesiothermic-reduction Catalytic Synthesis of Explosion Phase Boron Nitride (e-BN) Polycrystalline Nanopowders

GU Yun-Le,Ji-Lin WANG,Xin-Ye PAN   

  1. (School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073)
  • Received:2009-04-14 Revised:2010-01-06 Published:2010-03-22
  • Contact: GU Yun-Le E-mail:ncm@mail.wit.edu.cn

A convenient route to bulk polycrystalline nanopowders of explosion phase boron nitride (e-BN) was carried out through magnesiothermic-reduction of boron oxide (B2O3) and ammonium chloride (NH4Cl) catalyzed with anhydrous cobalt chloride (CoCl2) at temperatures ranging from 650 to 800℃ in a sealed stainless steel autoclave. X-ray diffraction (XRD) indicates a cubic phase with lattice parameter a=0.8304 nm. Fourier transform infrared spectroscopy (FTIR) shows characteristic absorption peaks at 500, 650, 797, 1085, 1374 and 1580 cm-1. Scanning electron microscopy (SEM) reveals the polycrystallites having approximately uniform quasi-spherical morphology with average diameter of about 70 nm. Chemical reaction and catalytic formation mechanism of the product was also proposed.

Key words: explosion phase boron nitride, magnesiothermic reduction, synthesis, nanomaterial