Single crystalline boron carbide nanobelts:synthesis and characterization

• 来源期刊: 中国物理B（英文版）
• 关键词: carbothermal reduction boron carbide nanobelts vapour-solid
• 年，卷（期）: 2008,（11）
• 页码范围: 4247-4252
• 页数: 6页
• 语种: 英文

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/B203/C/Fe powder as precursors at ll00~C.Transmission electron microscopy and selected area electron diffraction characterizations show that the boron carbide nanobelt has a B4C 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.