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摘要: 以高温烧结三聚氰胺制得的CNH化合物为C、N源,与分析纯单质硼粉以一定比例混合,在5.0~5.5 GPa、1 400~1 500 ℃高温高压条件下,经化学反应合成了六角硼碳氮(h-BCN)晶体。用傅立叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)对产物进行了表征,结果表明,得到了含碳量较高的六方结构B0.18C0.66N0.16化合物,成分接近于BC4N,硼、碳、氮是以原子化合的形式存在;XRD分析确定该合成产物具有六角网状结构;SEM测量结果表明,B-C-N晶体具有片状六角形貌,尺寸在1 m左右。Abstract: Hexagonal boron carbonitrogen (h-BCN) crystal was synthesized from the mixture of boron powder and CNH compound prepared by pyrolysis of Melamine (C3H3N3) under high temperature (1 400~1 500 ℃) and high pressure (5.0~5.5 GPa). X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy were used to determine the product chemical composition and characterization. The results show that the product has composition of B0.18C0.66N0.16 (near BC4N) and atomic-level hybrid. X-ray diffraction analysis indicates that the powder has hexagonal network structure. Scanning electron microscopy result suggests that h-BCN crystal morphology are mainly hexagonal flaky and the diameter is about 1 m, thickness 200 nm.
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Key words:
- HTHP synthesis /
- BCN flake /
- characterization
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