片状h-BCN化合物的高温高压化学合成与表征

Chemical Synthesis and Characterization of Flaky h-BCN by HPHT

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1μm左右。

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 μm,thickness 200 nm.