中国物理B ›› 2008, Vol. 17 ›› Issue (11): 4247-4252.doi: 10.1088/1674-1056/17/11/048

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Single crystalline boron carbide nanobelts: synthesis and characterization

鲍丽宏, 李 晨, 田 园, 田继发, 惠 超, 王兴军, 申承民, 高鸿钧   

  1. National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2008-03-24 修回日期:2008-04-21 出版日期:2008-11-20 发布日期:2008-11-20
  • 基金资助:
    Project supported by the National 863 (Grant No 2007AA03Z305) and 973 (Grant No 2007CB935503) program, the National Science Foundation of China (Grant Nos 60571045, 60620120443, Guo-JI He-Zuo).

Single crystalline boron carbide nanobelts: synthesis and characterization

Bao Li-Hong (鲍丽宏), Li Chen (李 晨), Tian Yuan (田 园), Tian Ji-Fa (田继发), Hui Chao (惠 超), Wang Xing-Jun (王兴军), Shen Cheng-Min (申承民), Gao Hong-Jun (高鸿钧)   

  1. National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2008-03-24 Revised:2008-04-21 Online:2008-11-20 Published:2008-11-20
  • Supported by:
    Project supported by the National 863 (Grant No 2007AA03Z305) and 973 (Grant No 2007CB935503) program, the National Science Foundation of China (Grant Nos 60571045, 60620120443, Guo-JI He-Zuo).

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摘要： This paper reports that the large-scale single crystalline boron carbide nanobelts have been fabricated through a simple carbothermal reduction method with B/B$_{2}$O$_{3}$/C/Fe powder as precursors at 1100${^\circ}$C. Transmission electron microscopy and selected area electron diffraction characterizations show that the boron carbide nanobelt has a B$_{4}$C rhomb-centred hexagonal structure with good crystallization. Electron energy loss spectroscopy analysis indicates that the nanobelt contains only B and C, and the atomic ratio of B to C is close to 4:1. High resolution transmission electron microscopy results show that the preferential growth direction of the nanobelt is [101]. A possible growth mechanism is also discussed.

Abstract: This paper reports that the large-scale single crystalline boron carbide nanobelts have been fabricated through a simple carbothermal reduction method with B/B$_{2}$O$_{3}$/C/Fe powder as precursors at 1100${^\circ}$C. Transmission electron microscopy and selected area electron diffraction characterizations show that the boron carbide nanobelt has a B$_{4}$C rhomb-centred hexagonal structure with good crystallization. Electron energy loss spectroscopy analysis indicates that the nanobelt contains only B and C, and the atomic ratio of B to C is close to 4:1. High resolution transmission electron microscopy results show that the preferential growth direction of the nanobelt is [101]. A possible growth mechanism is also discussed.

Key words: carbothermal reduction, boron carbide, nanobelts, vapour-solid

中图分类号:  (Nanoscale materials and structures: fabrication and characterization)

  • 81.07.-b
61.05.J- (Electron diffraction and scattering) 61.46.-w (Structure of nanoscale materials) 68.37.Lp (Transmission electron microscopy (TEM)) 79.20.Uv (Electron energy loss spectroscopy) 81.16.-c (Methods of micro- and nanofabrication and processing)